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Title: Enhancing hydrogen evolution activities in water splitting by tailoring Li+/Ni(OH){<_2}/Pt interfaces.

Abstract

Improving the sluggish kinetics for the electrochemical reduction of water to molecular hydrogen in alkaline environments is one key to reducing the high overpotentials and associated energy losses in water-alkali and chlor-alkali electrolyzers. We found that a controlled arrangement of nanometer-scale Ni(OH){sub 2} clusters on platinum electrode surfaces manifests a factor of 8 activity increase in catalyzing the hydrogen evolution reaction relative to state-of-the-art metal and metal-oxide catalysts. In a bifunctional effect, the edges of the Ni(OH){sub 2} clusters promoted the dissociation of water and the production of hydrogen intermediates that then adsorbed on the nearby Pt surfaces and recombined into molecular hydrogen. The generation of these hydrogen intermediates could be further enhanced via Li{sup +}-induced destabilization of the HO-H bond, resulting in a factor of 10 total increase in activity.

Authors:
; ; ; ; ; ; ;  [1];  [2];  [2]
  1. (Materials Science Division)
  2. (
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org.:
USDOE Office of Science (SC)
OSTI Identifier:
1033859
Report Number(s):
ANL/MSD/JA-71359
Journal ID: ISSN 0036-8075; SCIEAS; TRN: US201203%%138
DOE Contract Number:  
DE-AC02-06CH11357
Resource Type:
Journal Article
Journal Name:
Science (Washington, D.C.)
Additional Journal Information:
Journal Volume: 334; Journal Issue: 6060; Journal ID: ISSN 0036-8075
Country of Publication:
United States
Language:
ENGLISH
Subject:
08 HYDROGEN; CATALYSTS; DISSOCIATION; ELECTRODES; ENERGY LOSSES; HYDROGEN; KINETICS; PLATINUM; PRODUCTION; WATER

Citation Formats

Subbaraman, S., Tripkovic, D., Strmcnik, D., Chang, K-C., Uchimura, M., Paulikas, A. P., Stamenkovic, V., Markovic, N. M., NE), and Nissan Res. Ctr.). Enhancing hydrogen evolution activities in water splitting by tailoring Li+/Ni(OH){<_2}/Pt interfaces.. United States: N. p., 2011. Web. doi:10.1126/science.1211934.
Subbaraman, S., Tripkovic, D., Strmcnik, D., Chang, K-C., Uchimura, M., Paulikas, A. P., Stamenkovic, V., Markovic, N. M., NE), & Nissan Res. Ctr.). Enhancing hydrogen evolution activities in water splitting by tailoring Li+/Ni(OH){<_2}/Pt interfaces.. United States. doi:10.1126/science.1211934.
Subbaraman, S., Tripkovic, D., Strmcnik, D., Chang, K-C., Uchimura, M., Paulikas, A. P., Stamenkovic, V., Markovic, N. M., NE), and Nissan Res. Ctr.). Fri . "Enhancing hydrogen evolution activities in water splitting by tailoring Li+/Ni(OH){<_2}/Pt interfaces.". United States. doi:10.1126/science.1211934.
@article{osti_1033859,
title = {Enhancing hydrogen evolution activities in water splitting by tailoring Li+/Ni(OH){<_2}/Pt interfaces.},
author = {Subbaraman, S. and Tripkovic, D. and Strmcnik, D. and Chang, K-C. and Uchimura, M. and Paulikas, A. P. and Stamenkovic, V. and Markovic, N. M. and NE) and Nissan Res. Ctr.)},
abstractNote = {Improving the sluggish kinetics for the electrochemical reduction of water to molecular hydrogen in alkaline environments is one key to reducing the high overpotentials and associated energy losses in water-alkali and chlor-alkali electrolyzers. We found that a controlled arrangement of nanometer-scale Ni(OH){sub 2} clusters on platinum electrode surfaces manifests a factor of 8 activity increase in catalyzing the hydrogen evolution reaction relative to state-of-the-art metal and metal-oxide catalysts. In a bifunctional effect, the edges of the Ni(OH){sub 2} clusters promoted the dissociation of water and the production of hydrogen intermediates that then adsorbed on the nearby Pt surfaces and recombined into molecular hydrogen. The generation of these hydrogen intermediates could be further enhanced via Li{sup +}-induced destabilization of the HO-H bond, resulting in a factor of 10 total increase in activity.},
doi = {10.1126/science.1211934},
journal = {Science (Washington, D.C.)},
issn = {0036-8075},
number = 6060,
volume = 334,
place = {United States},
year = {2011},
month = {12}
}