当前位置：
X-MOL 学术
›
ACS Sustain. Chem. Eng.
›
论文详情
Our official English website, www.x-mol.net, welcomes your
feedback! (Note: you will need to create a separate account there.)
Nickel-Based Single-Atom Catalyst toward Triiodide Reduction Reaction in Hybrid Photovoltaics
ACS Sustainable Chemistry & Engineering ( IF 7.1 ) Pub Date : 2021-03-08 , DOI: 10.1021/acssuschemeng.1c00536 Di Lin 1 , Rui Jiang 1, 2 , Pin Ma 3 , Song Hong 1 , Zhihai Cheng 4 , Jianfeng Guo 4 , Rui Xu 4 , Yuan Lin 3 , Yingying Zhao 1 , Xiong Yin 1 , Leyu Wang 1
ACS Sustainable Chemistry & Engineering ( IF 7.1 ) Pub Date : 2021-03-08 , DOI: 10.1021/acssuschemeng.1c00536 Di Lin 1 , Rui Jiang 1, 2 , Pin Ma 3 , Song Hong 1 , Zhihai Cheng 4 , Jianfeng Guo 4 , Rui Xu 4 , Yuan Lin 3 , Yingying Zhao 1 , Xiong Yin 1 , Leyu Wang 1
Affiliation
|
It is very significant to obtain highly efficient, cost-effective, and durable electrocatalysts toward triiodide reduction reaction (TRR) in hybrid photovoltaics. In this study, a nickel-based single-atom catalyst (SAC) (Ni-SAC) was prepared by the facile carbonization of NiPc@ZIF-8 and explored as a highly efficient Pt-free catalyst for TRR. During the carbonization process, the Ni species were separated by coordinate nitrogen atoms and distributed homogeneously within the porous carbon matrix, with the formation of the atomically dispersed Ni–N4 active sites, revealed by the X-ray absorption fine structure and high-angle annular dark-field scanning transmission electron microscopy. Compared to the reference porous nitrogen-doped carbon, Ni-SAC exhibited superior catalytic activity toward TRR. More importantly, Ni-SAC possessed better stability over the triiodide/iodide redox couple than the Pt counterpart during the stability test. The resultant solar cell presented an efficiency of 7.42%, comparable to that of the Pt-based device (7.69%). Additionally, the Kelvin probe force microscopy measurement revealed that the enhanced catalytic activity of Ni-SAC originated from the moderate energy level matching with the triiodide/iodide redox couple. The formation of Ni–N4 active sites within the carbon matrix promoted the electron transferring at the interfaces of the catalyst/electrolyte. All results demonstrated that the SAC could be one of the Pt-free catalysts toward efficient TRR in hybrid photovoltaics.
中文翻译：
镍基单原子催化剂对混合光伏中三碘化物还原反应的影响
对于混合光伏电池而言，获得高效，低成本且耐用的三碘化物还原反应（TRR）的电催化剂具有非常重要的意义。在这项研究中，通过NiPc @ ZIF-8的轻质碳化制备了镍基单原子催化剂（SAC）（Ni-SAC），并被探索为TRR的高效无铂催化剂。在碳化过程中，Ni物种被配位氮原子分开并均匀分布在多孔碳基质中，形成了原子分散的Ni–N 4。通过X射线吸收精细结构和高角度环形暗场扫描透射电子显微镜揭示了活性位点。与参比的多孔氮掺杂碳相比，Ni-SAC对TRR表现出优异的催化活性。更重要的是，在稳定性测试中，Ni-SAC在三碘化物/碘化物氧化还原对上具有比Pt对应物更好的稳定性。所得太阳能电池的效率为7.42％，与基于Pt的器件的效率（7.69％）相当。另外，开尔文探针力显微镜测量显示，Ni-SAC增强的催化活性源自与三碘化物/碘化物氧化还原对匹配的中等能级。Ni–N 4的形成碳基质内的活性位促进了电子在催化剂/电解质界面处的转移。所有结果表明，SAC可能是在混合光伏中实现高效TRR的无Pt催化剂之一。
更新日期：2021-03-22
中文翻译：
镍基单原子催化剂对混合光伏中三碘化物还原反应的影响
对于混合光伏电池而言，获得高效，低成本且耐用的三碘化物还原反应（TRR）的电催化剂具有非常重要的意义。在这项研究中，通过NiPc @ ZIF-8的轻质碳化制备了镍基单原子催化剂（SAC）（Ni-SAC），并被探索为TRR的高效无铂催化剂。在碳化过程中，Ni物种被配位氮原子分开并均匀分布在多孔碳基质中，形成了原子分散的Ni–N 4。通过X射线吸收精细结构和高角度环形暗场扫描透射电子显微镜揭示了活性位点。与参比的多孔氮掺杂碳相比，Ni-SAC对TRR表现出优异的催化活性。更重要的是，在稳定性测试中，Ni-SAC在三碘化物/碘化物氧化还原对上具有比Pt对应物更好的稳定性。所得太阳能电池的效率为7.42％，与基于Pt的器件的效率（7.69％）相当。另外，开尔文探针力显微镜测量显示，Ni-SAC增强的催化活性源自与三碘化物/碘化物氧化还原对匹配的中等能级。Ni–N 4的形成碳基质内的活性位促进了电子在催化剂/电解质界面处的转移。所有结果表明，SAC可能是在混合光伏中实现高效TRR的无Pt催化剂之一。
京公网安备 11010802027423号