Conducting polymers consisting of metal-selective coordination units and a highly conductive backbone, so-called metallopolymers, are interesting materials exposing single atoms for photo/electrocatalysis and thus represent a potential low-cost alternative for bulk or nanoparticulate platinum group metals (PGMs). We synthesized and fully characterized an electropolymerisable monomer bearing a pendant terpyridine unit for the selective complexation of PGMs. Electrocatalytic tests of the resulting metallopolymer, poly-[(tThTerpy)PtCl]Cl, revealed activity both in the oxygen reduction reaction and hydrogen evolution reaction. Rotating disk experiments showed the direct four-electron reduction of molecular oxygen to water at low angular velocities of the rotating electrode. Furthermore, the fabrication of Pt metallopolymers proved to be simple, nonhazardous and versatile. This proof-of-concept opens up the possibility for developing future low-cost electro- and photocatalysts to replace current systems.

中文翻译：

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铂三联吡啶金属聚合物电极在氧还原反应和产氢反应中作为具有成本效益的块状铂催化剂的替代品

由金属选择性配位单元和高导电性主链组成的导电聚合物（所谓的金属聚合物）是令人关注的材料，它们暴露出单个原子以进行光/电催化作用，因此代表了块状或纳米微粒铂族金属（PGM）的潜在低成本替代品。我们合成并完全表征了带有PGM选择性配位侧基吡啶侧基单元的可电聚合单体。所得金属聚合物聚[[tThTerpy）PtCl] Cl的电催化测试显示了在氧还原反应和氢释放反应中均具有活性。旋转盘实验表明，在旋转电极的低角速度下，分子氧直接四电子还原为水。此外，事实证明Pt金属聚合物的制造非常简单，无危险且用途广泛。这一概念验证为开发将来的低成本电催化剂和光催化剂以替代现有系统提供了可能性。