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Title: Electrocatalysis of the HER in acid and alkaline media

Abstract

Trends in the HER are studied on selected metals (M= Cu, Ag, Au, Pt, Ru, Ir, Ti) in acid and alkaline environments. Here, we found that with the exception of Pt, Ir and Au, due to high coverage by spectator species on non-noble metal catalysts, experimentally established positions of Cu , Ag, Ru and Ti in the observed volcano relations are still uncertain. We also found that while in acidic solutions the M-Hupd binding energy most likely is controlling the activity trends, the trends in activity in alkaline solutions are controlled by a delicate balance between two descriptors: the M-Had interaction as well as the energetics required to dissociate water molecules. We confirm the importance of the second descriptor by introducing bifunctional catalysts such as M modified by Ni(OH); e.g. while the latter serves to enhance catalytic decomposition of water, the metal sites are required for collecting and recombining the produced hydrogen intermediates.

Authors:
 [1];  [1];  [1];  [1];  [1]
  1. Argonne National Lab. (ANL), Argonne, IL (United States). Materials Science Division
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
OSTI Identifier:
1395044
Grant/Contract Number:  
AC02-06CH11357
Resource Type:
Accepted Manuscript
Journal Name:
Journal of the Serbian Chemical Society
Additional Journal Information:
Journal Volume: 78; Journal Issue: 12; Journal ID: ISSN 0352-5139
Publisher:
Serbian Chemical Society
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY; volcano plot; HER; hydrogen evolution reaction; acid; alkaline

Citation Formats

Danilovic, Nemanja, Subbaraman, Ram, Strmcnik, Dusan, Stamenkovic, Vojislav, and Markovic, Nenad. Electrocatalysis of the HER in acid and alkaline media. United States: N. p., 2013. Web. doi:10.2298/JSC131118136D.
Danilovic, Nemanja, Subbaraman, Ram, Strmcnik, Dusan, Stamenkovic, Vojislav, & Markovic, Nenad. Electrocatalysis of the HER in acid and alkaline media. United States. doi:10.2298/JSC131118136D.
Danilovic, Nemanja, Subbaraman, Ram, Strmcnik, Dusan, Stamenkovic, Vojislav, and Markovic, Nenad. Tue . "Electrocatalysis of the HER in acid and alkaline media". United States. doi:10.2298/JSC131118136D. https://www.osti.gov/servlets/purl/1395044.
@article{osti_1395044,
title = {Electrocatalysis of the HER in acid and alkaline media},
author = {Danilovic, Nemanja and Subbaraman, Ram and Strmcnik, Dusan and Stamenkovic, Vojislav and Markovic, Nenad},
abstractNote = {Trends in the HER are studied on selected metals (M= Cu, Ag, Au, Pt, Ru, Ir, Ti) in acid and alkaline environments. Here, we found that with the exception of Pt, Ir and Au, due to high coverage by spectator species on non-noble metal catalysts, experimentally established positions of Cu , Ag, Ru and Ti in the observed volcano relations are still uncertain. We also found that while in acidic solutions the M-Hupd binding energy most likely is controlling the activity trends, the trends in activity in alkaline solutions are controlled by a delicate balance between two descriptors: the M-Had interaction as well as the energetics required to dissociate water molecules. We confirm the importance of the second descriptor by introducing bifunctional catalysts such as M modified by Ni(OH); e.g. while the latter serves to enhance catalytic decomposition of water, the metal sites are required for collecting and recombining the produced hydrogen intermediates.},
doi = {10.2298/JSC131118136D},
journal = {Journal of the Serbian Chemical Society},
number = 12,
volume = 78,
place = {United States},
year = {2013},
month = {1}
}

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