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Comparison between the measured and modeled hydrogen-evolution activity of Ni- or Pt-coated silicon photocathodes

Huang, Zhuangqun and McKone, James R. and Xiang, Chengxiang and Grimm, Ronald L. and Warren, Emily L. and Spurgeon, Joshua M. and Lewerenz, Hans-Joachim and Brunschwig, Bruce S. and Lewis, Nathan S. (2014) Comparison between the measured and modeled hydrogen-evolution activity of Ni- or Pt-coated silicon photocathodes. International Journal of Hydrogen Energy, 39 (28). pp. 16220-16226. ISSN 0360-3199. doi:10.1016/j.ijhydene.2013.12.162.

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The electrocatalytic behavior of Ni and Pt nanoparticles for the hydrogen-evolution reaction (HER) on p-type Si photocathodes was measured experimentally and the current density vs. potential (J–E) characteristics of a general metal catalyst on p-Si was modeled as a combination of a Si photodiode in series electrically with metal electrocatalysts. Relative to the rest potential, the J–E characteristics produced by the model showed an increase in total overpotential required to reach a specified current density for the metallized photoelectrodes relative to that of a metal electrode. This prediction was in accord with the experimentally observed behavior of Pt on p-Si, but was in contrast to the behavior observed for Ni on p-Si. Properly accounting for junction energetics and kinetics of the HER is critical to accurate predictions of the solar-to-hydrogen (STH) energy-conversion efficiency of metallized integrated photoelectrochemical systems. Further, models that accurately predict the performance of metal catalysts on semiconductor light absorbers are required to optimize the catalytic performance of metallized photoelectrodes.

Item Type:Article
Related URLs:
URLURL TypeDescription
McKone, James R.0000-0001-6445-7884
Xiang, Chengxiang0000-0002-1698-6754
Grimm, Ronald L.0000-0003-0407-937X
Warren, Emily L.0000-0001-8568-7881
Spurgeon, Joshua M.0000-0002-2987-0865
Lewerenz, Hans-Joachim0000-0001-8433-9471
Brunschwig, Bruce S.0000-0002-6135-6727
Lewis, Nathan S.0000-0001-5245-0538
Additional Information:© 2014, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. Received 10 October 2013; Received in revised form 19 December 2013; Accepted 24 December 2013; Available online 13 April 2014. This material is based upon work performed by the Joint Center for Artificial Photosynthesis, a DOE Energy Innovation Hub, supported through the Office of Science of the U.S. Department of Energy under Award Number DE-SC0004993. JRM acknowledges graduate research fellowship support from the U.S. Department of Energy, Office of Science. Research was in part carried out at the Molecular Materials Research Center of the Beckman Institute of the California Institute of Technology. Z.H. thanks Prof. Steve Maldonado, Joseph Beardslee, Heather Audesirk and Craig Wiggenhorn for their assistance with the experiments and for helpful discussions.
Funding AgencyGrant Number
Department of Energy (DOE)DE-SC0004993
Subject Keywords:Silicon; Photoelectrochemistry; Photocatalysis; HER; Interface; Solar fuels
Issue or Number:28
Record Number:CaltechAUTHORS:20140422-103752009
Persistent URL:
Official Citation:Zhuangqun Huang, James R. McKone, Chengxiang Xiang, Ronald L. Grimm, Emily L. Warren, Joshua M. Spurgeon, Hans-Joachim Lewerenz, Bruce S. Brunschwig, Nathan S. Lewis, Comparison between the measured and modeled hydrogen-evolution activity of Ni- or Pt-coated silicon photocathodes, International Journal of Hydrogen Energy, Volume 39, Issue 28, 23 September 2014, Pages 16220-16226, ISSN 0360-3199, (
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:45110
Deposited By: Ruth Sustaita
Deposited On:22 Apr 2014 18:38
Last Modified:30 Nov 2021 19:01

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