Hydrogen Evolution with Minimal Parasitic Light Absorption by Dense Co–P Catalyst Films on Structured p-Si Photocathodes

Kempler, Paul A.; Gonzalez, Miguel A.; Papadantonakis, Kimberly M.; Lewis, Nathan S.

doi:10.1021/acsenergylett.8b00034

Title: Hydrogen Evolution with Minimal Parasitic Light Absorption by Dense Co–P Catalyst Films on Structured p-Si Photocathodes

Abstract

Planar and three-dimensionally structured p-Si devices, consisting of an electrodeposited Co–P catalyst on arrays of Si microwires or Si micropyramids, were used as photocathodes for solar-driven hydrogen evolution in 0.50 M H₂SO₄(aq) to assess the effects of electrode structuring on parasitic absorption by the catalyst. Without the use of an emitter layer, p-Si/Co–P microwire arrays produced a photocurrent density of -10 mA cm^–2 at potentials that were 130 mV more positive than those of optimized planar p-Si/Co–P devices. Champion p-Si/Co–P microwire array devices exhibited ideal regenerative cell solar-to-hydrogen efficiencies of >2.5% and were primarily limited by the photovoltage of the p-Si/Co–P junction. Therefore, the vertical sidewalls of the Si microwire photoelectrodes minimized effects due to parasitic absorption at high loadings of catalyst for device structures with or without emitters.

Authors:

^[1]; Gonzalez, Miguel A. ^[1]; Papadantonakis, Kimberly M. ^[1];

^[1]

California Inst. of Technology (CalTech), Pasadena, CA (United States). Division of Chemistry and Chemical Engineering

Publication Date:: Thu Feb 08 00:00:00 EST 2018

Research Org.:: California Institute of Technology (CalTech), Pasadena, CA (United States)

Sponsoring Org.:: USDOE Office of Science (SC), Basic Energy Sciences (BES)

OSTI Identifier:: 1468686

Grant/Contract Number:: SC0004993

Resource Type:: Accepted Manuscript

Journal Name:: ACS Energy Letters

Additional Journal Information:: Journal Volume: 3; Journal Issue: 3; Journal ID: ISSN 2380-8195

Publisher:: American Chemical Society (ACS)

Country of Publication:: United States

Language:: English

Subject:: 14 SOLAR ENERGY; 37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY

Citation Formats


                    Kempler, Paul A., Gonzalez, Miguel A., Papadantonakis, Kimberly M., and Lewis, Nathan S. Hydrogen Evolution with Minimal Parasitic Light Absorption by Dense Co–P Catalyst Films on Structured p-Si Photocathodes.  United States: N. p., 2018. 
Web.  doi:10.1021/acsenergylett.8b00034.

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                    Kempler, Paul A., Gonzalez, Miguel A., Papadantonakis, Kimberly M., & Lewis, Nathan S. Hydrogen Evolution with Minimal Parasitic Light Absorption by Dense Co–P Catalyst Films on Structured p-Si Photocathodes.  United States.  https://doi.org/10.1021/acsenergylett.8b00034

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                    Kempler, Paul A., Gonzalez, Miguel A., Papadantonakis, Kimberly M., and Lewis, Nathan S. Thu .  
"Hydrogen Evolution with Minimal Parasitic Light Absorption by Dense Co–P Catalyst Films on Structured p-Si Photocathodes".  United States.  https://doi.org/10.1021/acsenergylett.8b00034.  https://www.osti.gov/servlets/purl/1468686.

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@article{osti_1468686,

  title        = {Hydrogen Evolution with Minimal Parasitic Light Absorption by Dense Co–P Catalyst Films on Structured p-Si Photocathodes},

  author       = {Kempler, Paul A. and Gonzalez, Miguel A. and Papadantonakis, Kimberly M. and Lewis, Nathan S.},

  abstractNote = {Planar and three-dimensionally structured p-Si devices, consisting of an electrodeposited Co–P catalyst on arrays of Si microwires or Si micropyramids, were used as photocathodes for solar-driven hydrogen evolution in 0.50 M H2SO4(aq) to assess the effects of electrode structuring on parasitic absorption by the catalyst. Without the use of an emitter layer, p-Si/Co–P microwire arrays produced a photocurrent density of -10 mA cm–2 at potentials that were 130 mV more positive than those of optimized planar p-Si/Co–P devices. Champion p-Si/Co–P microwire array devices exhibited ideal regenerative cell solar-to-hydrogen efficiencies of >2.5% and were primarily limited by the photovoltage of the p-Si/Co–P junction. Therefore, the vertical sidewalls of the Si microwire photoelectrodes minimized effects due to parasitic absorption at high loadings of catalyst for device structures with or without emitters.},

  doi          = {10.1021/acsenergylett.8b00034},

  journal      = {ACS Energy Letters},

  number       = 3,

  volume       = 3,

  place        = {United States},

  year         = {Thu Feb 08 00:00:00 EST 2018},

  month        = {Thu Feb 08 00:00:00 EST 2018}

}

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https://doi.org/10.1021/acsenergylett.8b00034

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Cited by: 33 works

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Figure 1: Scanning-electron micrographs of photoelectrochemically deposited Co-P particles after 400 mC cm^-2 charge was passed. (A) Top-down image of planar p-Si, inset: magnified image of individual particle showing nanoscale roughness; (B) Top-down image of p-Si microwire array showing minimal deposition along the base and caps of the wires; (C)more »

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Title: Hydrogen Evolution with Minimal Parasitic Light Absorption by Dense Co–P Catalyst Films on Structured p-Si Photocathodes

Abstract

Citation Formats

Figures / Tables:

Developing a scalable artificial photosynthesis technology through nanomaterials by design journal, December 2016

A comparative technoeconomic analysis of renewable hydrogen production using solar energy journal, January 2016

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journal, April 2014

Molybdenum Phosphosulfide: An Active, Acid-Stable, Earth-Abundant Catalyst for the Hydrogen Evolution Reaction
journal, October 2014

Investigation of the Size-Scaling Behavior of Spatially Nonuniform Barrier Height Contacts to Semiconductor Surfaces Using Ordered Nanometer-Scale Nickel Arrays on Silicon Electrodes
journal, December 2001

Silicon nanowire arrays coupled with cobalt phosphide spheres as low-cost photocathodes for efficient solar hydrogen evolution
journal, January 2015

Spatial decoupling of light absorption and catalytic activity of Ni–Mo-loaded high-aspect-ratio silicon microwire photocathodes
journal, January 2018

Comparison of the Performance of CoP-Coated and Pt-Coated Radial Junction n ⁺ p-Silicon Microwire-Array Photocathodes for the Sunlight-Driven Reduction of Water to H ₂ (g)
journal, April 2015

Functional integration of Ni–Mo electrocatalysts with Si microwire array photocathodes to simultaneously achieve high fill factors and light-limited photocurrent densities for solar-driven hydrogen evolution
journal, January 2015

CoP as an Acid-Stable Active Electrocatalyst for the Hydrogen-Evolution Reaction: Electrochemical Synthesis, Interfacial Characterization and Performance Evaluation
journal, October 2014

Operando Spectroscopic Analysis of CoP Films Electrocatalyzing the Hydrogen-Evolution Reaction
journal, September 2017

Sunlight absorption in water – efficiency and design implications for photoelectrochemical devices
journal, January 2014

OPAL 2: Rapid optical simulation of silicon solar cells
conference, June 2012

Solar Water Splitting Cells
journal, November 2010

Methods for comparing the performance of energy-conversion systems for use in solar fuels and solar electricity generation
journal, January 2015

Decorating mesoporous silicon with amorphous metal–phosphorous-derived nanocatalysts towards enhanced photoelectrochemical water reduction
journal, January 2016

Engineering Cobalt Phosphide (CoP) Thin Film Catalysts for Enhanced Hydrogen Evolution Activity on Silicon Photocathodes
journal, December 2015

Comparison of the device physics principles of planar and radial p-n junction nanorod solar cells
journal, June 2005

Electrodeposition of Noble Metals into Ordered Macropores in p-Type Silicon
journal, January 2008

Enhanced Absorption and <1% Spectrum-and-Angle-Averaged Reflection in Tapered Microwire Arrays
journal, September 2016

Unassisted solar-driven photoelectrosynthetic HI splitting using membrane-embedded Si microwire arrays
journal, January 2015

Profiling Photoinduced Carrier Generation in Semiconductor Microwire Arrays via Photoelectrochemical Metal Deposition
journal, July 2016

Nanoporous black silicon photocathode for H2 production by photoelectrochemical water splitting
journal, January 2011

Comparison of the device physics principles of planar and radial p-n junction nanorod solar cells
journal, June 2005

Ni/Fe Codoped In ₂ S ₃ Nanosheet Arrays Boost Photo‐Electrochemical Performance of Planar Si Photocathodes
journal, August 2019

Efficiency and stability of narrow-gap semiconductor-based photoelectrodes
journal, January 2019

Pt Nanocluster Co-Catalysts for Photocatalytic Water Splitting
journal, November 2018

Seebeck-voltage-triggered self-biased photoelectrochemical water splitting using HfOx/SiOx bi-layer protected Si photocathodes
journal, June 2019

Strategies for Semiconductor/Electrocatalyst Coupling toward Solar‐Driven Water Splitting
journal, March 2020

Enhancing photoelectrochemical hydrogen production of a n ⁺ p-Si hetero-junction photocathode with amorphous Ni and Ti layers
journal, January 2019

Integration of electrocatalysts with silicon microcone arrays for minimization of optical and overpotential losses during sunlight-driven hydrogen evolution
journal, January 2019

Seebeck-voltage-triggered self-biased photoelectrochemical water splitting using HfOx/SiOx bi-layer protected Si photocathodes
journal, June 2019