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Posted: Apr 25, 2017
Efficient Earth-abundant heterogeneous electrocatalysts for photoelectrochemical water splitting
(Nanowerk News) Developing earth-abundant heterogeneous electrocatalysts with high catalytic activity and stability to replace noble metal catalysts for both hydrogen evolution reactions (HERs) and oxygen evolution reactions (OERs) through photoelectrochemical (PEC) system is of great importance for achieving highly efficient water splitting.
Although several recent excellent articles have reviewed the research progress in advanced HERs and OERs catalysts for electrochemical water splitting, comprehensive reviews about earth-abundant heterogeneous electrocatalysts for PEC water splitting are still missing.
The researchers have discussed the earth-abundant electrocatalysts for water splitting, represented by the TMDs-based nanomaterials, transition metal carbides/phosphatides, and N-doped graphene for PEC-HERs, the mixed transition metal oxides, TMDs-based nanomaterials, and transition-metals and/or heteroatom-doped carbon catalysts for PEC-OERs.
Particular attention is paid to the strategies of catalytic performance improvement and composition/structure–catalytic activity relationships.
Furthermore, the main challenges and future prospects for further development of earth-abundant heterogeneous electrocatalysts for PEC water splitting are discussed.
This work provides an important overview for design of earth-abundant heterogeneous electrocatalysts and development of new methods capable of producing favorable interfaces between light absorbers and electrocatalysts, which may be key steps toward realizing integrated PEC water splitting systems.