Metal-Free and Pt-Decorated Graphene-Based Catalysts for Hydrogen Production in a Sulfur鈥揑odine Thermochemical Cycle

详细信息    查看全文

• 作者：Zheng Bo ; Xiuyan Zhang ; Kehan Yu ; Zhihua Wang ; Xiangdong Lin ; Jianhua Yan ; Kefa Cen
• 刊名：Industrial & Engineering Chemistry Research
• 出版年：2014
• 出版时间：July 30, 2014
• 年：2014
• 卷：53
• 期：30
• 页码：11920-11928
• 全文大小：739K
• ISSN：1520-5045

文摘

Graphene oxide (GO), GO reduced by hydrazine hydrate (rGO-HH), GO reduced by ethylene glycol (rGO-EG), Pt-decorated rGO-HH composite (Pt/rGO-HH), and Pt-decorated rGO-EG composite (Pt/rGO-EG), are fabricated for the heterogeneous catalytic decomposition of HI in a sulfur鈥搃odine thermochemical cycle. Corresponding material characterization on various catalysts are performed to gain insight into the catalytic mechanism. rGO-HH presents better catalytic activity than the GO and rGO-EG counterparts, due to the increase of active sites (unsaturated carbon atoms) with the reduction of oxygen-containing groups and the formation of edge planes. Homogeneously dispersed fine Pt nanoparticles are obtained with employing rGO-EG as the support. The corrugation morphology and graphene edges benefit the nucleation, dispersion, and immobilization of Pt nanoparticles. As a consequence, Pt/rGO-EG presents better catalytic activity and stability than the convenient Pt/activated-carbon (Pt/AC) counterpart. Results indicate that the graphene-based catalysts hold a great promise for the catalytic decomposition of HI.