Rhodium-molybdenum oxide electrocatalyst with dual active sites for electrochemical ammonia synthesis under neutral pH condition

Chung, S; Seo, DH; Choi, M; Mao, X; Du, A; Ham, K; Giddey, S; Lee, J; Ju, HK

Rhodium-molybdenum oxide electrocatalyst with dual active sites for electrochemical ammonia synthesis under neutral pH condition

Chung, S Seo, DH Choi, M Mao, X Du, A Ham, K Giddey, S Lee, J Ju, HK

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Publisher:: Elsevier BV
Publication Type:: Journal Article
Citation:: Journal of Electroanalytical Chemistry, 2021, 896, pp. 115157
Issue Date:: 2021-09-01

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Field	Value	Language
dc.contributor.author	Chung, S
dc.contributor.author	Seo, DH
dc.contributor.author	Choi, M
dc.contributor.author	Mao, X
dc.contributor.author	Du, A
dc.contributor.author	Ham, K
dc.contributor.author	Giddey, S
dc.contributor.author	Lee, J
dc.contributor.author	Ju, HK
dc.date.accessioned	2022-05-14T00:52:52Z
dc.date.available	2022-05-14T00:52:52Z
dc.date.issued	2021-09-01
dc.identifier.citation	Journal of Electroanalytical Chemistry, 2021, 896, pp. 115157
dc.identifier.issn	1572-6657
dc.identifier.uri	http://hdl.handle.net/10453/157336
dc.description.abstract	Electrochemical nitrogen reduction reaction (NRR) process has attracted significant attention recently as an alternative route for green ammonia (NH3) production to replace conventional, energy intensive Haber-Bosh process. However, a major challenge in NRR process is the relatively poor selectivity of NRR process over its competing hydrogen evolution reaction (HER) process. Herein, we report the synthesis of molybdenum oxide decorated on the rhodium (RhMoOx/C) catalyst for an efficient NRR with high selectivity. RhMoOx/C catalyst exhibits an outstanding NH3 yield rate of 57.2 μg h−1 mgcat−1 at −0.6 V vs. RHE and a high faradaic efficiency of 22% at −0.2 V vs. RHE in 0.1 M Na2SO4 electrolyte. This study reveals the interdependent relationship between the catalyst structure, operating conditions, and the reaction selectivity in the electrochemical NH3 synthesis. Moreover, this study also demonstrates the effectiveness of the bimetallic materials in enhancing the NRR process which is an important finding for designing a future electrocatalyst for electrochemical NH3 production.
dc.language	en
dc.publisher	Elsevier BV
dc.relation.ispartof	Journal of Electroanalytical Chemistry
dc.relation.isbasedon	10.1016/j.jelechem.2021.115157
dc.rights	info:eu-repo/semantics/closedAccess
dc.subject	0301 Analytical Chemistry, 0303 Macromolecular and Materials Chemistry, 0307 Theoretical and Computational Chemistry
dc.title	Rhodium-molybdenum oxide electrocatalyst with dual active sites for electrochemical ammonia synthesis under neutral pH condition
dc.type	Journal Article
utslib.citation.volume	896
utslib.for	0301 Analytical Chemistry
utslib.for	0303 Macromolecular and Materials Chemistry
utslib.for	0307 Theoretical and Computational Chemistry
pubs.organisational-group	/University of Technology Sydney
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology/School of Civil and Environmental Engineering
pubs.organisational-group	/University of Technology Sydney/Strength - CTWW - Centre for Technology in Water and Wastewater Treatment
utslib.copyright.status	closed_access	*
dc.date.updated	2022-05-14T00:52:50Z
pubs.publication-status	Published
pubs.volume	896

Abstract:

Electrochemical nitrogen reduction reaction (NRR) process has attracted significant attention recently as an alternative route for green ammonia (NH3) production to replace conventional, energy intensive Haber-Bosh process. However, a major challenge in NRR process is the relatively poor selectivity of NRR process over its competing hydrogen evolution reaction (HER) process. Herein, we report the synthesis of molybdenum oxide decorated on the rhodium (RhMoOx/C) catalyst for an efficient NRR with high selectivity. RhMoOx/C catalyst exhibits an outstanding NH3 yield rate of 57.2 μg h−1 mgcat−1 at −0.6 V vs. RHE and a high faradaic efficiency of 22% at −0.2 V vs. RHE in 0.1 M Na2SO4 electrolyte. This study reveals the interdependent relationship between the catalyst structure, operating conditions, and the reaction selectivity in the electrochemical NH3 synthesis. Moreover, this study also demonstrates the effectiveness of the bimetallic materials in enhancing the NRR process which is an important finding for designing a future electrocatalyst for electrochemical NH3 production.

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http://hdl.handle.net/10453/157336