Photocatalytic Overall Water Splitting Under Visible Light Enabled by a Particulate Conjugated Polymer Loaded with Palladium and Iridium**
Photocatalytic Overall Water Splitting Under Visible Light Enabled by a Particulate Conjugated Polymer Loaded with Palladium and Iridium**
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由负载钯和铱的颗粒共轭聚合物实现可见光下光催化整体水分解**
DOI：
10.1002/ange.202201299
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发表时间：
2022
影响因子：
--
通讯作者：
Bai Y
中科院分区：
文献类型：
--
作者：
Bai Y
近年来，聚合物光催化剂在光催化水制氢方面受到了越来越多的关注。大多数研究报道了牺牲电子供体制氢，这不适合大规模的氢能生产。在这里，我们表明，负载钯/氧化Ir的二苯并[b，d]噻吩砜均聚物(P10)在系统稳定后的较长时间内(>；60 小时)促进了整个水的裂解，以产生化学计量的H_2和O_2。这些结果表明，当负载适当的助催化剂时，共轭聚合物可以作为单组份的光催化体系来整体分解水，尽管目前活性较低。瞬变光谱表明，IrO2助催化剂在裂解水所需的电荷分离态的产生中起着重要作用，并证明了快速空穴转移到助催化剂上的证据。
Polymer photocatalysts have received growing attention in recent years for photocatalytic hydrogen production from water. Most studies report hydrogen production with sacrificial electron donors, which is unsuitable for large‐scale hydrogen energy production. Here we show that the palladium/iridium oxide‐loaded homopolymer of dibenzo[b,d]thiophene sulfone (P10) facilitates overall water splitting to produce stoichiometric amounts of H2and O2for an extended period (>60 hours) after the system stabilized. These results demonstrate that conjugated polymers can act as single component photocatalytic systems for overall water splitting when loaded with suitable co‐catalysts, albeit currently with low activities. Transient spectroscopy shows that the IrO2co‐catalyst plays an important role in the generation of the charge separated state required for water splitting, with evidence for fast hole transfer to the co‐catalyst.