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负载Pt(0,II,IV)的氧化钛片上的光催化CO还原和电催化析氢反应

Photocatalytic CO Reduction and Electrocatalytic H Evolution over Pt(0,II,IV)-Loaded Oxidized Ti Sheets.

作者信息

Yang Ju Hyun, Park So Jeong, Rhee Choong Kyun, Sohn Youngku

机构信息

Department of Chemistry, Chungnam National University, Daejeon 34134, Korea.

Department of Chemical Engineering and Applied Chemistry, Chungnam National University, Daejeon 34134, Korea.

出版信息

Nanomaterials (Basel). 2020 Sep 24;10(10):1909. doi: 10.3390/nano10101909.

DOI:10.3390/nano10101909
PMID:32987906
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC7600856/
Abstract

Energy recycling and production using abundant atmospheric CO and HO have increasingly attracted attention for solving energy and environmental problems. Herein, Pt-loaded Ti sheets were prepared by sputter-deposition and Pt-reduction methods, and their catalytic activities on both photocatalytic CO reduction and electrochemical hydrogen evolution were fully demonstrated. The surface chemical states were completely examined by X-ray photoelectron spectroscopy before and after CO reduction. Gas chromatography confirmed that CO, CH, and CHOH were commonly produced as CO reduction products with total yields up to 87.3, 26.9, and 88.0 μmol/mol, respectively for 700 °C-annealed Ti under UVC irradiation for 13 h. Pt-loading commonly negated the CO reduction yields, but CH selectivity was increased. Electrochemical hydrogen evolution reaction (HER) activity showed the highest activity for sputter-deposited Pt on 400 °C-annealed Ti with a HER current density of 10.5 mA/cm at -0.5 V (vs. Ag/AgCl). The activities of CO reduction and HER were found to be significantly dependent on both the nature of Ti support and the oxidation states (0,II,IV) of overlayer Pt. The present result could provide valuable information for designing efficient Pt/Ti-based CO recycle photocatalysts and electrochemical hydrogen production catalysts.

摘要

利用丰富的大气中的一氧化碳和水进行能量回收和生产，对于解决能源和环境问题越来越受到关注。在此，通过溅射沉积和铂还原方法制备了负载铂的钛片，并充分展示了它们在光催化一氧化碳还原和电化学析氢方面的催化活性。在一氧化碳还原前后，通过X射线光电子能谱对表面化学状态进行了全面检测。气相色谱证实，在700℃退火的钛在UVC照射13小时的条件下，一氧化碳、甲烷和甲醇通常作为一氧化碳还原产物生成，总产率分别高达87.3、26.9和88.0μmol/mol。负载铂通常会降低一氧化碳还原产率，但甲烷选择性增加。电化学析氢反应（HER）活性表明，在400℃退火的钛上溅射沉积的铂具有最高活性，在-0.5V（相对于Ag/AgCl）时HER电流密度为10.5mA/cm²。发现一氧化碳还原和HER的活性显著依赖于钛载体的性质和覆盖层铂的氧化态（0、II、IV）。目前的结果可为设计高效的基于铂/钛的一氧化碳循环光催化剂和电化学制氢催化剂提供有价值的信息。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8472/7600856/70c2d077fe45/nanomaterials-10-01909-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8472/7600856/d8e75de8e218/nanomaterials-10-01909-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8472/7600856/3c687821144c/nanomaterials-10-01909-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8472/7600856/f49a8def7d1c/nanomaterials-10-01909-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8472/7600856/284d5352ad06/nanomaterials-10-01909-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8472/7600856/0289dd327a45/nanomaterials-10-01909-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8472/7600856/3809adc6e7eb/nanomaterials-10-01909-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8472/7600856/70c2d077fe45/nanomaterials-10-01909-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8472/7600856/d8e75de8e218/nanomaterials-10-01909-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8472/7600856/3c687821144c/nanomaterials-10-01909-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8472/7600856/f49a8def7d1c/nanomaterials-10-01909-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8472/7600856/284d5352ad06/nanomaterials-10-01909-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8472/7600856/0289dd327a45/nanomaterials-10-01909-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8472/7600856/3809adc6e7eb/nanomaterials-10-01909-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8472/7600856/70c2d077fe45/nanomaterials-10-01909-g007.jpg

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