A bio-inspired coordination polymer as outstanding water oxidation catalyst via second coordination sphere engineering
发表时间：2019-12-01
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- 论文类型：
- 期刊论文
- 第一作者：
- Li, Wenlong
- 合写作者：
- Li, Fusheng,Yang, Hao,Wu, Xiujuan,Zhang, Peili,Shan, Yu,Sun, Licheng
- 发表时间：
- 2019-11-07
- 发表刊物：
- NATURE COMMUNICATIONS
- 收录刊物：
- SCIE、PubMed
- 文献类型：
- J
- 卷号：
- 10
- 期号：
- 1
- 页面范围：
- 5074
- ISSN号：
- 2041-1723
- 摘要：
- First-row transition metal-based catalysts have been developed for the oxygen evolution reaction (OER) during the past years, however, such catalysts typically operate at overpotentials (eta) significantly above thermodynamic requirements. Here, we report an iron/ nickel terephthalate coordination polymer on nickel form (NiFeCP/NF) as catalyst for OER, in which both coordinated and uncoordinated carboxylates were maintained after electrolysis. NiFeCP/NF exhibits outstanding electro-catalytic OER activity with a low overpotential of 188 mV at 10 mA cm(-2) in 1.0 KOH, with a small Tafel slope and excellent stability. The pH-independent OER activity of NiFeCP/NF on the reversible hydrogen electrode scale suggests that a concerted proton-coupled electron transfer (c-PET) process is the rate-determining step (RDS) during water oxidation. Deuterium kinetic isotope effects, proton inventory studies and atom-proton-transfer measurements indicate that the uncoordinated carboxylates are serving as the proton transfer relays, with a similar function as amino acid residues in photosystem II (PSII), accelerating the proton-transfer rate.
- 是否译文：
- 否
