Optimizing "artificial leaf photoanode-photocathode-catalyst interface systems for solar water splitting

S. H. Porter; S. Hwang; V. Amarasinghe; E. Taghaddos; V. Manichev; M. Li; G. Gardner; A. Safari; Eric Garfunkel; M. Greenblatt; G Charles Dismukes

doi:10.1149/07237.0001ecst

Optimizing "artificial leaf photoanode-photocathode-catalyst interface systems for solar water splitting

S. H. Porter, S. Hwang, V. Amarasinghe, E. Taghaddos, V. Manichev, M. Li, G. Gardner, A. Safari, Eric Garfunkel, M. Greenblatt, G Charles Dismukes

Rutgers University

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

2 Citations (Scopus)

Abstract

A novel dual photoabsorber interface: perovskite oxynitride (SrNb0₂N) deposited on silicon (100), and a H₂ER catalyst photoabsorber interface: (Ni₅P₄ or Ni₂P)-silicon, are fabricated. Titanium nitride (TiN) is introduced as a blocking layer between Sr₂Nb:0₇ and Si (100), which produces clean interfaces. During the high temperature ammonolysis step needed to convert Sr₂Nb₂0₇ to SrNb0₂N, it is effective at blocking Nb and Si (but not Sr) migration. A half-cell cathode with the H2ER catalyst (Ni5P4 or Ni2P)-photoabsorber interface produces H2 approaching best-in-class overpotentials for films (N15P4: 211mV vs RHE at 10mV/cm²) with a 50mV/decade Tafel slope. Films are atomically smooth, except for surface phosphate that is removed during electrolysis.

Original language	English
Title of host publication	Renewable Fuels via Artificial Photosynthesis or Electrolysis
Publisher	Electrochemical Society Inc.
Pages	1-19
Number of pages	19
Volume	72
Edition	37
ISBN (Electronic)	9781607685395
DOIs	https://doi.org/10.1149/07237.0001ecst
Publication status	Published - 2016
Event	Symposium on Renewable Fuels via Artificial Photosynthesis or Electrolysis - 229th ECS Meeting - San Diego, United States Duration: May 29 2016 → Jun 2 2016

Other

Other	Symposium on Renewable Fuels via Artificial Photosynthesis or Electrolysis - 229th ECS Meeting
Country	United States
City	San Diego
Period	5/29/16 → 6/2/16

ASJC Scopus subject areas

Engineering(all)

Access to Document

10.1149/07237.0001ecst

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Porter, S. H., Hwang, S., Amarasinghe, V., Taghaddos, E., Manichev, V., Li, M., Gardner, G., Safari, A., Garfunkel, E., Greenblatt, M., & Dismukes, G. C. (2016). Optimizing "artificial leaf photoanode-photocathode-catalyst interface systems for solar water splitting. In Renewable Fuels via Artificial Photosynthesis or Electrolysis (37 ed., Vol. 72, pp. 1-19). Electrochemical Society Inc.. https://doi.org/10.1149/07237.0001ecst

Optimizing "artificial leaf photoanode-photocathode-catalyst interface systems for solar water splitting. / Porter, S. H.; Hwang, S.; Amarasinghe, V.; Taghaddos, E.; Manichev, V.; Li, M.; Gardner, G.; Safari, A.; Garfunkel, Eric; Greenblatt, M.; Dismukes, G Charles.

Renewable Fuels via Artificial Photosynthesis or Electrolysis. Vol. 72 37. ed. Electrochemical Society Inc., 2016. p. 1-19.

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Porter, SH, Hwang, S, Amarasinghe, V, Taghaddos, E, Manichev, V, Li, M, Gardner, G, Safari, A, Garfunkel, E, Greenblatt, M & Dismukes, GC 2016, Optimizing "artificial leaf photoanode-photocathode-catalyst interface systems for solar water splitting. in Renewable Fuels via Artificial Photosynthesis or Electrolysis. 37 edn, vol. 72, Electrochemical Society Inc., pp. 1-19, Symposium on Renewable Fuels via Artificial Photosynthesis or Electrolysis - 229th ECS Meeting, San Diego, United States, 5/29/16. https://doi.org/10.1149/07237.0001ecst

Porter, S. H. ; Hwang, S. ; Amarasinghe, V. ; Taghaddos, E. ; Manichev, V. ; Li, M. ; Gardner, G. ; Safari, A. ; Garfunkel, Eric ; Greenblatt, M. ; Dismukes, G Charles. / Optimizing "artificial leaf photoanode-photocathode-catalyst interface systems for solar water splitting. Renewable Fuels via Artificial Photosynthesis or Electrolysis. Vol. 72 37. ed. Electrochemical Society Inc., 2016. pp. 1-19

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abstract = "A novel dual photoabsorber interface: perovskite oxynitride (SrNb02N) deposited on silicon (100), and a H2ER catalyst photoabsorber interface: (Ni5P4 or Ni2P)-silicon, are fabricated. Titanium nitride (TiN) is introduced as a blocking layer between Sr2Nb:07 and Si (100), which produces clean interfaces. During the high temperature ammonolysis step needed to convert Sr2Nb207 to SrNb02N, it is effective at blocking Nb and Si (but not Sr) migration. A half-cell cathode with the H2ER catalyst (Ni5P4 or Ni2P)-photoabsorber interface produces H2 approaching best-in-class overpotentials for films (N15P4: 211mV vs RHE at 10mV/cm2) with a 50mV/decade Tafel slope. Films are atomically smooth, except for surface phosphate that is removed during electrolysis.",

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