文献类型：期刊文献

英文题名：Polymer hydrogel supported Pd-Ni-B nanoclusters as robust catalysts for hydrogen production from hydrolysis of sodium borohydride

作者：Liu, Wenyu[1];Cai, Haokun[1,2];Lu, Ping[1];Xu, Qiumei[1];Zhongfu, Yafeng[1];Dong, Jian[1,3]

机构：[1]Shaoxing Univ, Sch Chem & Chem Engn, Shaoxing 312000, Zhejiang, Peoples R China;[2]Ningbo Univ, Fac Mat Sci & Chem Engn, Ningbo 315211, Zhejiang, Peoples R China;[3]Nanjing Univ, State Key Lab Coordinat Chem, Nanjing 210093, Jiangsu, Peoples R China

年份：2013

卷号：38

期号：22

起止页码：9206

外文期刊名：INTERNATIONAL JOURNAL OF HYDROGEN ENERGY

收录：SCI-EXPANDED(收录号：WOS:000322562800017)、、EI(收录号：20132916504659)、Scopus(收录号：2-s2.0-84879962592)、WOS

基金：This work was supported by Natural Science Foundation of Zhejiang Province (No. Y4090504 and LY12E03001), Department of Science and Technology of Zhejiang Province (2012C24003) and the National Natural Science Foundation of China (No. 20974063).

语种：英文

外文关键词：Hydrogen; Catalysis; Nanoparticle; Hydrolysis; Hydrogel

外文摘要：Catalyzed sodium borohydride hydrolysis is a highly valuable method to produce clean hydrogen energy for portable applications. This study provides a new and fast route to preparation of reusable hybrid materials composed of nickel-boron based nanoclusters dispersed in nanoporous poly(acrylamide) hydrogels for catalyzed hydrogen production. Palladium was added to the Ni-B catalysts during chemical reduction under the protection of poly(N-vinylpyrrolidone). The resulting nanoclusters immobilized in the hydrogels were essentially alloy particles with uni-modal size distributions and average diameters ranging from ca. 4-8 nm. Pd exerted significant promoting effects on the activities of the Ni-B catalysts. The highest activity was achieved for Pd-Ni-B nanoclusters with a charge ratio of Pd/Ni = 1/20 in moles, which exhibited activity nearly twice that of a Ni-B catalyst and good recyclability for consecutive uses. The hydrogen production rates also increased with the decreasing particle sizes. The activation energy, enthalpy and entropy for the reaction were determined to be 31.10 kJ mol(-1), 28.39 kJ mol(-1) and -45.22 J mol(-1) K-1, respectively. The activation energy is lower than that of previously reported polymer-stabilized Co(0), Fe(0), or Ni(0) nanoparticle catalysts. Copyright (C) 2013, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.