Nanostructured Materials for Applications in Heterogeneous Catalysis II

A special issue of Catalysts (ISSN 2073-4344). This special issue belongs to the section "Catalytic Materials".

Deadline for manuscript submissions: closed (31 December 2022) | Viewed by 1671

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Laboratory of Separation and Reaction Engineering - Laboratory of Catalysis and Materials (Associate Laboratory LSRE-LCM), Department of Chemical Engineering, Faculdade de Engenharia da Universidade do Porto (FEUP), Rua Dr. Roberto Frias s/n, 4200-465 Porto, Portugal
Interests: photocatalytic science and technology; heterogeneous catalysis; environmental catalysis; green chemistry; fine chemical synthesis; solar fuels; materials science; chemical engineering
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Special Issue Information

Dear Colleagues,

This is the second edition of the Special Issue titled “Nanostructured Materials for Applications in Heterogeneous Catalysis”. Advanced nanotechnology has been in rapid development over the last few decades. A great deal of effort has been made in the rational design and preparation of a novel family of complex solids with attractive characteristics, which have already found applications in catalysis. When nanostructured materials are applied as heterogeneous catalysts, in comparison with traditional powdery catalysts, the former exhibit the superior properties of nanoparticles and new effects originating from synergies at the nanoscale, with many unmatchable improvements in terms of size, shape, surface structure, number of catalytically active sites, catalytic selectivity and so on, as identified by molecular-level study of the reaction mechanism.

The unique synergy between surface chemistry and nanostructure has led to many exciting developments in the field of heterogeneous catalysis, gradually becoming the hotspot of materials science and promising to revolutionize chemical manufacturing. The aim of this Special Issue is to cover promising recent research and novel trends in heterogeneous catalysis employing various nanostructured materials for extensive applications in the fields of thermal catalysis, photocatalysis, electrocatalysis, photoelectrocatalysis, biocatalysis etc., in research areas ranging from environmental remediation to organic transformations and renewable energy.

Dr. Cláudia Gomes Silva
Guest Editor

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Keywords

  • nanostructured materials
  • surface chemistry
  • heterocatalysts
  • photocatalysts
  • electrocatalysts
  • biocatalysts
  • conventional catalysts
  • renewable energy
  • environmental remediation
  • organic transformation

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Published Papers (1 paper)

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Research

14 pages, 3956 KiB  
Article
Optimization of SnPd Shell Configuration to Boost ORR Performance of Pt-Clusters Decorated CoOx@SnPd Core-Shell Nanocatalyst
by Mingxing Cheng, Dinesh Bhalothia, Wei Yeh, Amisha Beniwal, Che Yan, Kuan-Wen Wang, Po-Chun Chen, Xin Tu and Tsan-Yao Chen
Catalysts 2022, 12(11), 1411; https://doi.org/10.3390/catal12111411 - 11 Nov 2022
Cited by 2 | Viewed by 1395
Abstract
Fuel cells are expected to bring change to the whole human race when commercialized, however, the sluggish kinetics of oxygen reduction reaction (ORR) severely hampers their commercial viability. Thus far, platinum (Pt) based catalysts are nearly inevitable due to the harsh redox environment [...] Read more.
Fuel cells are expected to bring change to the whole human race when commercialized, however, the sluggish kinetics of oxygen reduction reaction (ORR) severely hampers their commercial viability. Thus far, platinum (Pt) based catalysts are nearly inevitable due to the harsh redox environment of fuel cells. Thus, minimizing Pt metal loading and increasing Pt utilization is a paramount factor for realizing fuel cell technologies. In this context, herein, we developed a multi-metallic nanocatalyst (NC) comprising Pt-clusters (1 wt.%) decorated SnPd composite shell over cobalt-oxide core crystal underneath (denoted as CSPP). For optimizing the ORR performance of the as-prepared NC, we further modulated the configuration of the SnPd shell. In the optimum case, when the Sn/Pd ratio is 0.5 (denoted as CSPP 1005), the ORR mass activity (MA) is 3034.7 mA mgPt−1 at 0.85 V vs. RHE in 0.1 M KOH electrolyte, which is 45-times higher than the commercial Johnson Matthey-Pt/C (J.M.-Pt/C; 20 wt.% Pt) catalyst (67 mA mgPt−1). The results of physical inspections along with electrochemical analysis suggest that such high performance of CSPP 1005 NC can be attributed to the synergistic collaboration between Pt-clusters, PtPd nanoalloys, and adjacent SnPd domains, where Pt-clusters and PtPd nanoalloys promote the O2 adsorption and subsequent splitting, while the SnPd shell favours the OH relocation step. We believe that the obtained results will open a new avenue for further exploring the high-performance Pt-based catalysts with low Pt-loading and high utilization. Full article
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