Effect of Shell Thickness on the Properties of Multi-Pd Cores-Hollow Carbon Shell Catalyst mPd@HCS

IF 2.1 4区 化学 Q3 CHEMISTRY, PHYSICAL Catalysis Surveys from Asia Pub Date : 2022-07-04 DOI:10.1007/s10563-022-09362-y
Feifei Hu, Chengbing Fu, Chenchen Zhao, Peng Liu, Wei Tian, Bo Chen, Hongyan Pan, Qian Lin
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Abstract

Traditional catalysts with one core and one shell structure have few active sites and shell structure parameters are difficult to be regulated. In order to solve these two problems, it is presented herein a multi-Pd-core and porous carbon shell catalyst mPd@HCS, where multiple Pd nuclei provide more active sites for the reaction, the shell structure parameters are tuned by the adjustment of shell thickness, and the influence of shell thickness on the performance of H2O2 direct synthesis was mainly investigated. The results showed that the selectivity and yield of H2O2 changed volcanically with the increase of carbon crust thickness because of the compromise between reactants diffusion and product degradation, and the selectivity (87%) and productivity (1938 mmol gPd−1 h−1) of the sample with middle shell thickness (10.18 nm) were the highest.

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壳层厚度对多钯芯-空心碳壳催化剂性能的影响mPd@HCS
传统的一核一壳结构催化剂活性位点少,壳结构参数难以调控。为了解决这两个问题,本文提出了一种多钯核多孔碳壳催化剂mPd@HCS,其中多钯核为反应提供了更多的活性位点,通过调整壳层厚度来调整壳层结构参数,并主要研究了壳层厚度对H2O2直接合成性能的影响。结果表明,H2O2的选择性和产率随碳壳厚度的增加呈火山状变化,这是由于反应物扩散和产物降解之间的折衷,其中,中壳厚度(10.18 nm)样品的选择性(87%)和产率(1938 mmol gPd−1 h−1)最高。
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来源期刊
Catalysis Surveys from Asia
Catalysis Surveys from Asia 化学-物理化学
CiteScore
4.80
自引率
0.00%
发文量
29
审稿时长
>12 weeks
期刊介绍: Early dissemination of important findings from Asia which may lead to new concepts in catalyst design is the main aim of this journal. Rapid, invited, short reviews and perspectives from academia and industry will constitute the major part of Catalysis Surveys from Asia . Surveys of recent progress and activities in catalytic science and technology and related areas in Asia will be covered regularly as well. We would appreciate critical comments from colleagues throughout the world about articles in Catalysis Surveys from Asia . If requested and thought appropriate, the comments will be included in the journal. We will be very happy if this journal stimulates global communication between scientists and engineers in the world of catalysis.
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