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- W2892067042 abstract "Abstract Improving the charge separation and transport efficiency at semiconductor‐electrolyte interface is critical for high‐performance photoelectrochemical (PEC) water‐splitting devices. Here, the core‐shell‐structured Ni@Co nanoislands were electrodeposited onto the surface of n‐type Si photoanode to construct a metal‐insulator‐semiconductor (MIS) structure. We discover that the high‐quality interface in Si/SiO x /Ni MIS structure is more efficient for charge extraction and transfer than Si/SiO x /Co. Owing to a slightly higher work function for Co (5.0 eV) than Ni (4.6 eV), the Si/SiO x /Ni@Co exhibits the larger band bending to enhance the charge separation efficiency, while the in‐situ formed CoOOH significantly increases the charge injection efficiency due to the decreased oxygen‐evolution overpotentials. As a result, the Ni@Co core‐shell nanoparticles coupling with n‐Si photoanode can afford the PEC performance with an onset potential of 1.02 V versus reversible hydrogen electrode (RHE), saturated current density of 36.7 mA cm −2 , and retain good stability in K‐borate buffer solution. This core‐shell structure strategy is efficient and easy to achieve the separation of photogenerated carriers and improve the charge injection efficiency to nearly 100 %" @default.
- W2892067042 created "2018-09-27" @default.
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- W2892067042 date "2018-10-16" @default.
- W2892067042 modified "2023-10-18" @default.
- W2892067042 title "High‐Performance and Stable Silicon Photoanode Modified by Crystalline Ni@ Amorphous Co Core‐Shell Nanoparticles" @default.
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- W2892067042 doi "https://doi.org/10.1002/cctc.201801417" @default.
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