Tailored Catalytic Nanoframes from Metal–Organic Frameworks by Anisotropic Surface Modification and Etching for the Hydrogen Evolution Reaction,Angewandte Chemie International Edition

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Tailored Catalytic Nanoframes from Metal–Organic Frameworks by Anisotropic Surface Modification and Etching for the Hydrogen Evolution Reaction
Angewandte Chemie International Edition ( IF 16.1 ) Pub Date : 2020-11-20 , DOI: 10.1002/anie.202010618
Ze‐Xing Cai _{1,

2,

3} , Zhong‐Li Wang ₄ , Yan‐Jie Xia ₂ , Hyunsoo Lim ₅ , Wei Zhou ₆ , Ayano Taniguchi ₃ , Masataka Ohtani ₃ , Kazuya Kobiro ₃ , Takeshi Fujita ₃ , Yusuke Yamauchi _{1,

5}

Affiliation

A facile anisotropic surface modification and etching strategy is presented for the synthesis of hollow structured ZIF‐67 nanoframes. The strategy uses structural and compositional distinctions between each crystallographic facet of truncated rhombic dodecahedrons ZIF‐67 (tZIF‐67 RDs) and the moderate coordinating and etching effects of cyanuric acid (CA). The CA can anisotropically modify and protect the {110} facets from etching, causing the six {100} facets be selectively etched via an inside‐out manner, and finally forming the hollow nanoframes. The surface‐modified hollow tZIF‐67 RDs can be facet‐selectively etched by metal salts in an outside‐in manner to give metal‐doped tZIF‐67 nanoframes. After calcination, the metal‐tZIF‐67 hybrids are converted into metal‐Co alloy/C composite catalysts with hollow nanoframed structures. The PtCo/C catalyst with only 5.9 wt % Pt exhibits high catalytic activities and stabilities in the hydrogen evolution reaction (HER) in acidic solutions.

中文翻译：

通过各向异性表面改性和蚀刻从金属-有机骨架定制的催化纳米框架，以进行氢气释放反应

提出了一种简便的各向异性表面改性和蚀刻策略，用于合成中空结构的ZIF-67纳米框架。该策略使用了截断菱形十二面体ZIF-67（tZIF-67 RD）的每个晶体学方面与氰尿酸（CA）的适度配位和蚀刻效果之间的结构和成分区分。CA可以各向异性地修改{110}刻面并保护其不受腐蚀，从而通过内而外的方式选择性地刻蚀六个{100}刻面，最终形成空心纳米框架。表面修饰过的空心tZIF-67 RD可以用金属盐以外部方式进行刻面选择性蚀刻，从而得到掺杂金属的tZIF-67纳米框架。煅烧后，金属-tZIF-67杂化物转化为具有空心纳米框架结构的金属-钴合金/ C复合催化剂。

更新日期：2020-11-20

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