Activated Ni–OH Bonds in a Catalyst Facilitates the Nucleophile Oxidation Reaction. Issue 27 (31st May 2022)

• Record Type: Journal Article
• Authors: Chen, Wei; Wang, Yanyong; Wu, Binbin; Shi, Jianqiao; Li, Yingying; Xu, Leitao; Xie, Chao; Zhou, Wang; Huang, Yu‐Cheng; Wang, Tehua; Du, Shiqian; Song, Minglei; Wang, Dongdong; Chen, Chen; Zheng, Jianyun; Liu, Jilei; Dong, Chung‐Li; Zou, Yuqin; Chen, Jun; Wang, Shuangyin
• Is Part Of: Advanced materials. Volume 34:Issue 27(2022)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2022-05-31
• Subjects: electrocatalysis -- layered double hydroxides -- nucleophile oxidation reaction -- organic electrosynthesis -- space‐confinement‐induced synthesis; Materials -- Periodicals; Chemical vapor deposition -- Periodicals; 620.11
• DOI: 10.1002/adma.202105320
• Languages: English
• ISSNs: 0935-9648

Abstract

Abstract: The nucleophile oxidation reaction (NOR) is of enormous significance for organic electrosynthesis and coupling for hydrogen generation. However, the nonuniform NOR mechanism limits its development. For the NOR, involving electrocatalysis and organic chemistry, both the electrochemical step and non‐electrochemical process should be taken into account. The NOR of nickel‐based hydroxides includes the electrogenerated dehydrogenation of the Ni 2+ –OH bond and a spontaneous non‐electrochemical process; the former determines the electrochemical activity, and the nucleophile oxidation pathway depends on the latter. Herein, the space‐confinement‐induced synthesis of Ni3 Fe layered double hydroxide intercalated with single‐atom‐layer Pt nanosheets (Ni3 Fe LDH‐Pt NS) is reported. The synergy of interlayer Pt nanosheets and multiple defects activates Ni–OH bonds, thus exhibiting an excellent NOR performance. The spontaneous non‐electrochemical steps of the NOR are revealed, such as proton‐coupled electron transfer (PCET; Ni 3+ –O + X–H = Ni 2+ –OH + X ), hydration, and rearrangement. Hence, the reaction pathway of the NOR is deciphered, which not only helps to perfect the NOR mechanism, but also provides inspiration for organic electrosynthesis. Abstract : The nucleophile oxidation reaction (NOR) is a complex reaction including electrochemical step and spontaneous non‐electrochemical process. The interlayer Pt nanosheets and multiple defects of Ni3 Fe LDH‐Pt NS enable the activated Ni 2+ –OH to exhibit an excellent NOR activity. More importantly, spontaneous non‐electrochemical steps, including proton‐coupled electron transfer, hydration, and rearrangement, lead to diverse nucleophile dehydrogenation oxidation pathways of different NOR systems.