Electrocatalytic CO 2 Reduction at Pyridine Functionalized Au Nanoparticles Supported by NanoCOT Electrode
Electrocatalytic CO 2 Reduction at Pyridine Functionalized Au Nanoparticles Supported by NanoCOT Electrode
复制标题
NanoCOT 电极支持的吡啶功能化金纳米粒子电催化 CO 2 还原
DOI：
10.1149/1945-7111/aca17f
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发表时间：
2022
影响因子：
3.9
通讯作者：
Pan, Shanlin
中科院分区：
文献类型：
--
作者：
Ashaduzzaman, Md;Kang, Xin;Strange, Lyndi;Pan, Shanlin
如果采用高选择性、高效、耐用的电催化剂，二氧化碳还原反应（CO 2 RR）是一种很有前途的缓解全球变暖和储存可再生能源的技术。在这里，我们报道了由吡啶和嘧啶（例如，2-巯基吡啶（2Mpy）， 4-巯基吡啶（4Mpy）和2-巯基吡啶（2mpm））稳定的金纳米颗粒（NPs）在纳米结构碳掺杂的tio2纳米线（NanoCOT）电极上催化的CO 2 RR，该电极之前已被我们的团队报道用于电催化水氧化。在线气相色谱（GC）装置具有改进的气体产物灵敏度和实时压力监测，用于定量Au np修饰NanoCOT电极的CO和氢产物。在Au-2Mpy涂层纳米cot电极上观察到高CO选择性。在裸纳米cot上没有观察到CO 2的还原产物，这表明CO 2在电极的Au纳米粒子位点上被还原。此外，在旋转环盘电极（RRDE）分析中，Au- mpy /Mpym NPs上没有检测到CH 3 OH，这意味着与Au NPs连接的吡啶没有文献中声称的对CO 2 RR的催化作用。使用NanoCOT阳极和Au NP-NanoCOT阴极电极组装了一个耐用的完整h电池，用于完成水分解，co2 RR和稳定性测试。
CO 2 reduction reaction (CO 2 RR) is a promising technique for mitigating global warming and storing renewable energy if it can be obtained with a highly selective, efficient, and durable electrocatalyst. Here, we report CO 2 RR catalyzed by Au nanoparticles (NPs) stabilized by pyridines and pyrimidines (eg, 2-mercaptopyridine (2Mpy), 4-mercaptopyridine (4Mpy), and 2-mercaptopyrimidine (2Mpym)) on a nanostructured carbon-doped TiO 2 nanowire (NanoCOT) electrode, which has been previously reported by our team for electrocatalytic water oxidation. An online gas chromatography (GC) set-up with improved gaseous product sensitivity with real-time pressure monitoring is used to quantify CO and hydrogen products from the Au NP-modified NanoCOT electrode. High CO selectivity is observed at Au-2Mpy coated NanoCOT electrode. CO 2 reduction products are not observed at bare NanoCOT suggesting CO 2 is reduced at the Au nanoparticle sites of the electrode. Moreover, CH 3 OH is not detected at the Au-Mpy/Mpym NPs during rotating ring disk electrode (RRDE) analysis which implies pyridine attached to the Au NPs has no catalytic effects on CO 2 RR as claimed by others in the literature. A durable complete H-cell using a NanoCOT anode and Au NP-NanoCOT cathode electrodes is assembled for complete water splitting, CO 2 RR, and stability test.