asteroza + chemistry   91

Principles of Dynamic Heterogeneous Catalysis: Surface Resonance and Turnover Frequency Response | ACS Catalysis
If the catalyst oscillates near the chemical reaction resonance frequency, you can break the Sabatier maximum catalyst reaction rate
catalyst  chemical  reaction  rate  mateirals  science  physics  chemistry  research  technology  vibration  oscillation  surface  resonance 
9 weeks ago by asteroza
A map of the inorganic ternary metal nitrides | Nature Materials
Computational chemistry to pinpoint materials that should be checked/tested for first.
computational  chemistry  materials  science  discovery  mapping  research  technology  metal  nitride  inorganic 
june 2019 by asteroza
Identification of the mechanism responsible for the boron oxygen light induced degradation in silicon photovoltaic cells: Journal of Applied Physics: Vol 125, No 18
PV solar cell degradation actually has a previously unseen mechanism, which has now been identified. It appears the solution to "repair" degraded solar panels (increase effective lifetime) is to heat them in the dark for a few minutes at 200C, but that only resets the lifetime and doesn't prevent degradation? Unfortunately, wire solder melts at below 200C, so you can't just bake an old panel in your home oven to fix it or the interconnects will dribble out.
PC  solar  panel  cell  silicon  light  degradation  lifetime  mechanism  physics  chemistry  materials  science  research  technology 
june 2019 by asteroza
A Colorful Pallet of B-Phycoerythrin Proteoforms Exposed by a Multimodal Mass Spectrometry Approach: Chem
characterizing cynobacteria photosynthesis pathways, in particular the fancy chemical antennas that make cynobacteria so efficient, might lead to making synthetic analogues with higher efficiency
photosynthesis  chemistry  bilogy  research  technology 
may 2019 by asteroza
Efficient CO2 Utilization via a Hybrid Na-CO2 System Based on CO2 Dissolution - ScienceDirect
Converts CO2 to hydrogen and baking soda via electrolytic cell and aqueous solution. Dependent on the aqueous solution though, where does that come from, how hard is it to regenerate, etc. Makes power too
CCS  CO2  carbon  capture  baking  soda  hydrogen  gas  production  power  generator  electrolytic  cell  sodium  ionic  conductor  NASICON  separator  membrane  chemistry 
february 2019 by asteroza
Cr-Mo-V-W: A new refractory and transition metal high-entropy alloy system - ScienceDirect
Chromium, Tungsten, Rhenium plus other bits metal alloy calculated to melt at 3044K. Possibly usable for molten salt nuclear reactors.
high  entropy  metal  alloy  materials  science  research  technology  temperature  refractory  computational  chemistry 
september 2018 by asteroza
Enzymatic construction of highly strained carbocycles | Science
Bicyclobutnae is a pain and expensive to make, so hasn't been seriously researched for rocket propellant research, but using e.coli to make it via enzyme catalyst now makes it a biofuel (biorocketfuel?). 8C boiling point versus cryogenic methane makes for an interesting trade study.
bicyclobutane  biology  organic  chemistry  materials  science  research  technology  rocket  fuel  propellant  biofuel  e.coli  bacteria  enzyme  production  catalyst 
july 2018 by asteroza
Structural and functional studies of a Fusarium oxysporum cutinase with polyethylene terephthalate modification potential. - PubMed - NCBI
This is the original japanese bacteria found at a waste dump that had evolved to eat PET plastic waste. The enzyme that enabled this was recently further isolated and refined.
PET  plastic  waste  enzyme  biology  chemistry  research  technology 
april 2018 by asteroza
Engineering a plastic-eating enzyme
Isolated a japanese bacteria's plastic eating enzyme, and accidentally made it more powerful.

DOI link is busted
PET  enzyme  biology  materials  science  chemistry  research  technology  plastic  waste 
april 2018 by asteroza
Electron mean-free-path filtering in Dirac material for improved thermoelectric performance
Getting grain size below 10 nanometers triples the zT, but that is in 0.1 to 0.3 zT so nothing earth shattering yet.
computational  chemistry  materials  science  research  technology  simulation  thermoelectric 
january 2018 by asteroza
Evidence for single metal two electron oxidative addition and reductive elimination at uranium | Nature Communications
Interesting work on reversible oxidation chemistry using uranium, as a potential alternative to rhodium or palladium
uranium  chemistry  materials  science  research 
december 2017 by asteroza
List of Physical Visualizations
Interesting 3D objects for physics/chemistry/data visualization, by a physical object/token
physics  chemistry  3D  information  data  visualization  model  physical  passive  sculpture  art 
june 2017 by asteroza
Synthesis and characterization of triangulene : Nature Nanotechnology : Nature R...
direct mechanical synthesis of triangulene by using a scanning electron microscope to knock hydrogen atoms off.
triangulene  chemistry  materials  science  research  technology  direct  mechanical  synthesis  APM  Delicious 
february 2017 by asteroza
Catalytically active Au-O(OH)x- species stabilized by alkali ions on zeolites and mesoporous oxides
single atom gold particles supported by alkali ions seem to work pretty well as a active catalyst site for a water-gas shift reaction, making hydrogen production cheaper/easier
gold  water  gas  shift  reaction  catalyst  hydrogen  production  materials  science  chemistry  research  technology  Delicious 
january 2015 by asteroza
Hydrogen Production from Ammonia Using Sodium Amide - Journal of the American Chemical Society (ACS Publications)
New no catalyst, twin parallel chemical reaction method that looks be cheap and efficient at cracking ammonia for hydrogen.
ammonia  decomposition  cracking  hydrogen  production  sodium  amide  NaNH2  chemistry  research  alternative  Delicious 
june 2014 by asteroza
Materials Project
Predicting new materials by supercomputing the combinations and brute forcing it.
computational  chemistry  materials  science  research  technology  theoretical  compound  Delicious 
april 2014 by asteroza
A metal-free organic-inorganic aqueous flow battery : Nature : Nature Publishing Group
Interesting take on flow batteries, using organic molecules similar to a part of rhubarb. A lot cheaper than vanadium too. Too bad about the bromic acid...
rhubarb  quinone  aqueous  redox  flow  battery  energy  storage  organic  chemistry  AQDS  bromide  materials  science  research  technology  green  grid  Delicious 
january 2014 by asteroza
VCU News
Theoretical model may point to weird interlocking hexagon structure to allow 3D metallic carbon at STP, possibly synthesizable using benzene/polyacene rather than using a diamond anvil.
technology  materials  chemistry  carbon  3D  metallic  theoretical  research  science  Delicious 
november 2013 by asteroza
New Coal Technology Harnesses Energy Without Burning, Nears Pilot-Scale Development
Interesting chemical loop method to bypass direct combustion of coal or syngas. Used sealed process to strip iron oxide of oxygen with coal or syngas carbon to produce CO2 and reduced iron oxide, along with any coal dregs. The reduced iron oxide is brought outside of the chemical reactor and exposed to air, which causes it to heat up exothermically as it reacquires oxygen, the heat of which can run a conventional boiler for a steam turbine power generator. Makes CO2 capture much easier, and allows isolation of slag materials for separation/vitrification, rather than sending it up as flue gases. Wonder if this could be paired with the chemical looping desalination processes proposed for high temperature nuclear reactors?
direct  CO2  looping  research  SCL  iron  syngas  CDCL  oxide  chemistry  coal  carbon  chemical  capture  power  CCS  Delicious 
february 2013 by asteroza
Caltech Chemical Engineers Devise New Way to Split Water - Caltech Media Relations
850C 4 step thermochemical complete water splitting for hydrogen gas production, which puts it in the realm of operation with high temperature nuclear reactors.
thermochemical  water  splitting  manganese  oxide  sodium  carbonate  hydrogen  gas  production  chemistry  research  development  850C  Delicious 
august 2012 by asteroza
Cement nanotubes as a natural means for reinforcing concrete
Interesting. Does this imply using nanotubes of cement within cement pastes could eliminate the need for separate steel reinforcement (and potentially eliminate the reinforcement creation/placement stage in construction?)
portlandite  cement  nanotube  materials  science  research  technology  nanotechnology  inorganic  chemistry  Delicious 
june 2012 by asteroza
A computational study of novel nitratoxycarbon, nitritocarbonyl, and nitrate compounds and their potential as high energy materials 10.1016/j.comptc.2011.10.011 : Computational and Theoretical Chemistry | ScienceDirect.com
Apparently a unique synthetic chemical compound originally put together by a 10 year old, verified through computational chemistry. Possible applications as a novel explosive or energy storage mechanism, but synthesizing it seems rather hard. When you see 4 nitrogen atoms that close together, you know it's going to be a party...
explosive  science  chemistry  computational  technology  research  materials  hemical  synthetic  tetranitratoxycarbon  Delicious 
february 2012 by asteroza
Three Dimensional Carbon-Nanotube Polymers - ACS Nano (ACS Publications)
If the progression is from individual tubes to aligned tubes (anisotropic), could something similar be done with buckyballs to make a porous solid, like some 3D honeycomb sponge (isotropic)?
3D  nanotube  polymer  materials  science  research  technology  nanotechnology  computational  chemistry  prediction  simulation  Delicious 
december 2011 by asteroza
Copper hexacyanoferrate battery electrodes with long cycle life and high power : Nature Communications : Nature Publishing Group
High cycle durability cathode material, if matched with a hydrated potassium ion aqueous electrolyte. Still searching for a suitable anode though. May be suitable for grid energy storage due to ease of manufacturing and cost.
copper  hexacyanoferrate  crystalline  crystal  nanoparticle  nanocrystal  high  voltage  cathode  electrode  materials  science  research  technology  nanotechnology  energy  storage  battery  chemistry  Delicious 
december 2011 by asteroza
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