콘텐츠로 건너뛰기
Merck
  • Electrocatalytic and photocatalytic hydrogen production from acidic and neutral-pH aqueous solutions using iron phosphide nanoparticles.

Electrocatalytic and photocatalytic hydrogen production from acidic and neutral-pH aqueous solutions using iron phosphide nanoparticles.

ACS nano (2014-09-25)
Juan F Callejas, Joshua M McEnaney, Carlos G Read, J Chance Crompton, Adam J Biacchi, Eric J Popczun, Thomas R Gordon, Nathan S Lewis, Raymond E Schaak
초록

Nanostructured transition-metal phosphides have recently emerged as Earth-abundant alternatives to platinum for catalyzing the hydrogen-evolution reaction (HER), which is central to several clean energy technologies because it produces molecular hydrogen through the electrochemical reduction of water. Iron-based catalysts are very attractive targets because iron is the most abundant and least expensive transition metal. We report herein that iron phosphide (FeP), synthesized as nanoparticles having a uniform, hollow morphology, exhibits among the highest HER activities reported to date in both acidic and neutral-pH aqueous solutions. As an electrocatalyst operating at a current density of -10 mA cm(-2), FeP nanoparticles deposited at a mass loading of ∼1 mg cm(-2) on Ti substrates exhibited overpotentials of -50 mV in 0.50 M H2SO4 and -102 mV in 1.0 M phosphate buffered saline. The FeP nanoparticles supported sustained hydrogen production with essentially quantitative faradaic yields for extended time periods under galvanostatic control. Under UV illumination in both acidic and neutral-pH solutions, FeP nanoparticles deposited on TiO2 produced H2 at rates and amounts that begin to approach those of Pt/TiO2. FeP therefore is a highly Earth-abundant material for efficiently facilitating the HER both electrocatalytically and photocatalytically.

MATERIALS
제품 번호
브랜드
제품 설명

Sigma-Aldrich
Sodium phosphate monobasic, anhydrous, free-flowing, Redi-Dri, ≥99.0%
Sigma-Aldrich
Potassium phosphate dibasic, puriss. p.a., ACS reagent, anhydrous, ≥99.0% (T)
Sigma-Aldrich
Potassium phosphate dibasic, ACS reagent, ≥98%
Oleic acid, European Pharmacopoeia (EP) Reference Standard
Supelco
Sulfuric acid concentrate, 0.1 M H2SO4 in water (0.2N), eluent concentrate for IC
Sigma-Aldrich
Sodium phosphate monobasic solution, BioUltra, 5 M in H2O
Sigma-Aldrich
Titanium(IV) oxide, nanopowder, 21 nm primary particle size (TEM), ≥99.5% trace metals basis
Supelco
1-Octadecene, analytical standard, ≥99.0% (GC)
Sigma-Aldrich
1-Octadecene, ≥95.0% (GC)
Sigma-Aldrich
Oleic acid, natural, FCC
Sigma-Aldrich
Oleic acid, meets analytical specification of Ph, Eur., 65.0-88.0% (GC)
Sigma-Aldrich
Titanium(IV) oxide, anatase, powder, −325 mesh, ≥99% trace metals basis
Sigma-Aldrich
Oleic acid, technical grade, 90%
Sigma-Aldrich
Oleylamine, technical grade, 70%
Sigma-Aldrich
Titanium(IV) oxide, contains 1% Mn as dopant, nanopowder, <100 nm particle size (BET), ≥97%
Supelco
Oleic acid, analytical standard
Sigma-Aldrich
Potassium phosphate dibasic, anhydrous, for luminescence, for molecular biology, BioUltra, ≥99.0% (T)
Sigma-Aldrich
1-Octadecene, technical grade, 90%
Sigma-Aldrich
Sodium phosphate monobasic, purum p.a., anhydrous, ≥99.0% (T)
Sigma-Aldrich
Potassium phosphate dibasic, 99.95% trace metals basis
Sigma-Aldrich
Titanium(IV) oxide, anatase, powder, 99.8% trace metals basis
Sigma-Aldrich
Oleic acid, ≥99% (GC)
Sigma-Aldrich
Sodium phosphate monobasic, BioPerformance Certified, suitable for cell culture, suitable for insect cell culture, suitable for plant cell culture, ≥99.0% (titration)
Sigma-Aldrich
Potassium phosphate dibasic, reagent grade, ≥98.0%
Sigma-Aldrich
Sodium phosphate monobasic, BioReagent, for molecular biology, anhydrous, ≥98%
Sigma-Aldrich
Sodium phosphate monobasic, meets USP testing specifications, anhydrous
Sigma-Aldrich
Potassium phosphate dibasic solution, 1.0 M
Sigma-Aldrich
Potassium phosphate dibasic, meets USP testing specifications
Sigma-Aldrich
Sodium phosphate monobasic, BioXtra, ≥99.0%
Sigma-Aldrich
Sodium phosphate monobasic, ReagentPlus®, ≥99.0%