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 H2(g)

Christopher W. Roske; Eric J. Popczun; Brian Seger; Carlos G. Read; Thomas Pedersen; Ole Hansen; Peter C.K. Vesborg; Bruce S. Brunschwig; Raymond E. Schaak; Ib Chorkendorff; Harry B. Gray; Nathan S. Lewis

doi:10.1021/acs.jpclett.5b00495

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 H₂(g)

Christopher W. Roske, Eric J. Popczun, Brian Seger, Carlos G. Read, Thomas Pedersen, Ole Hansen, Peter C.K. Vesborg, Bruce S. Brunschwig, Raymond E. Schaak, Ib Chorkendorff, Harry B. Gray, Nathan S. Lewis

Research output: Contribution to journal › Article › peer-review

63 Scopus citations

Abstract

The electrocatalytic performance for hydrogen evolution has been evaluated for radial-junction n⁺p-Si microwire (MW) arrays with Pt or cobalt phosphide, CoP, nanoparticulate catalysts in contact with 0.50 M H₂SO₄(aq). The CoP-coated (2.0 mg cm^-2) n⁺p-Si MW photocathodes were stable for over 12 h of continuous operation and produced an open-circuit photovoltage (V_oc) of 0.48 V, a light-limited photocurrent density (J_ph) of 17 mA cm^-2, a fill factor (ff) of 0.24, and an ideal regenerative cell efficiency (_IRC) of 1.9% under simulated 1 Sun illumination. Pt-coated (0.5 mg cm^-2) n⁺p-Si MW-array photocathodes produced V_oc = 0.44 V, J_ph = 14 mA cm^-2, ff = 0.46, and = 2.9% under identical conditions. Thus, the MW geometry allows the fabrication of photocathodes entirely comprised of earth-abundant materials that exhibit performance comparable to that of devices that contain Pt.

Original language	English (US)
Pages (from-to)	1679-1683
Number of pages	5
Journal	Journal of Physical Chemistry Letters
Volume	6
Issue number	9
DOIs	https://doi.org/10.1021/acs.jpclett.5b00495
State	Published - May 7 2015

All Science Journal Classification (ASJC) codes

General Materials Science
Physical and Theoretical Chemistry

Access to Document

10.1021/acs.jpclett.5b00495

Cite this

Roske, C. W., Popczun, E. J., Seger, B., Read, C. G., Pedersen, T., Hansen, O., Vesborg, P. C. K., Brunschwig, B. S., Schaak, R. E., Chorkendorff, I., Gray, H. B., & Lewis, N. S. (2015). 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 H₂(g). Journal of Physical Chemistry Letters, 6(9), 1679-1683. https://doi.org/10.1021/acs.jpclett.5b00495

@article{222591739d264048ae3c73b0fa648b08,

title = "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 H2(g)",

abstract = "The electrocatalytic performance for hydrogen evolution has been evaluated for radial-junction n+p-Si microwire (MW) arrays with Pt or cobalt phosphide, CoP, nanoparticulate catalysts in contact with 0.50 M H2SO4(aq). The CoP-coated (2.0 mg cm-2) n+p-Si MW photocathodes were stable for over 12 h of continuous operation and produced an open-circuit photovoltage (Voc) of 0.48 V, a light-limited photocurrent density (Jph) of 17 mA cm-2, a fill factor (ff) of 0.24, and an ideal regenerative cell efficiency (IRC) of 1.9% under simulated 1 Sun illumination. Pt-coated (0.5 mg cm-2) n+p-Si MW-array photocathodes produced Voc = 0.44 V, Jph = 14 mA cm-2, ff = 0.46, and = 2.9% under identical conditions. Thus, the MW geometry allows the fabrication of photocathodes entirely comprised of earth-abundant materials that exhibit performance comparable to that of devices that contain Pt.",

author = "Roske, {Christopher W.} and Popczun, {Eric J.} and Brian Seger and Read, {Carlos G.} and Thomas Pedersen and Ole Hansen and Vesborg, {Peter C.K.} and Brunschwig, {Bruce S.} and Schaak, {Raymond E.} and Ib Chorkendorff and Gray, {Harry B.} and Lewis, {Nathan S.}",

year = "2015",

month = may,

day = "7",

doi = "10.1021/acs.jpclett.5b00495",

language = "English (US)",

volume = "6",

pages = "1679--1683",

journal = "Journal of Physical Chemistry Letters",

issn = "1948-7185",

publisher = "American Chemical Society",

number = "9",

}

Roske, CW, Popczun, EJ, Seger, B, Read, CG, Pedersen, T, Hansen, O, Vesborg, PCK, Brunschwig, BS, Schaak, RE, Chorkendorff, I, Gray, HB & Lewis, NS 2015, '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 H₂(g)', Journal of Physical Chemistry Letters, vol. 6, no. 9, pp. 1679-1683. https://doi.org/10.1021/acs.jpclett.5b00495

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 H₂(g). / Roske, Christopher W.; Popczun, Eric J.; Seger, Brian et al.
In: Journal of Physical Chemistry Letters, Vol. 6, No. 9, 07.05.2015, p. 1679-1683.

Research output: Contribution to journal › Article › peer-review

TY - JOUR

T1 - 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 H2(g)

AU - Roske, Christopher W.

AU - Popczun, Eric J.

AU - Seger, Brian

AU - Read, Carlos G.

AU - Pedersen, Thomas

AU - Hansen, Ole

AU - Vesborg, Peter C.K.

AU - Brunschwig, Bruce S.

AU - Schaak, Raymond E.

AU - Chorkendorff, Ib

AU - Gray, Harry B.

AU - Lewis, Nathan S.

PY - 2015/5/7

Y1 - 2015/5/7

N2 - The electrocatalytic performance for hydrogen evolution has been evaluated for radial-junction n+p-Si microwire (MW) arrays with Pt or cobalt phosphide, CoP, nanoparticulate catalysts in contact with 0.50 M H2SO4(aq). The CoP-coated (2.0 mg cm-2) n+p-Si MW photocathodes were stable for over 12 h of continuous operation and produced an open-circuit photovoltage (Voc) of 0.48 V, a light-limited photocurrent density (Jph) of 17 mA cm-2, a fill factor (ff) of 0.24, and an ideal regenerative cell efficiency (IRC) of 1.9% under simulated 1 Sun illumination. Pt-coated (0.5 mg cm-2) n+p-Si MW-array photocathodes produced Voc = 0.44 V, Jph = 14 mA cm-2, ff = 0.46, and = 2.9% under identical conditions. Thus, the MW geometry allows the fabrication of photocathodes entirely comprised of earth-abundant materials that exhibit performance comparable to that of devices that contain Pt.

AB - The electrocatalytic performance for hydrogen evolution has been evaluated for radial-junction n+p-Si microwire (MW) arrays with Pt or cobalt phosphide, CoP, nanoparticulate catalysts in contact with 0.50 M H2SO4(aq). The CoP-coated (2.0 mg cm-2) n+p-Si MW photocathodes were stable for over 12 h of continuous operation and produced an open-circuit photovoltage (Voc) of 0.48 V, a light-limited photocurrent density (Jph) of 17 mA cm-2, a fill factor (ff) of 0.24, and an ideal regenerative cell efficiency (IRC) of 1.9% under simulated 1 Sun illumination. Pt-coated (0.5 mg cm-2) n+p-Si MW-array photocathodes produced Voc = 0.44 V, Jph = 14 mA cm-2, ff = 0.46, and = 2.9% under identical conditions. Thus, the MW geometry allows the fabrication of photocathodes entirely comprised of earth-abundant materials that exhibit performance comparable to that of devices that contain Pt.

UR - http://www.scopus.com/inward/record.url?scp=84929012031&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84929012031&partnerID=8YFLogxK

U2 - 10.1021/acs.jpclett.5b00495

DO - 10.1021/acs.jpclett.5b00495

M3 - Article

C2 - 26263333

SN - 1948-7185

VL - 6

SP - 1679

EP - 1683

JO - Journal of Physical Chemistry Letters

JF - Journal of Physical Chemistry Letters

IS - 9

ER -

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 H₂(g)

Abstract

All Science Journal Classification (ASJC) codes

Access to Document

Other files and links

Fingerprint

Cite this