Porous single-crystalline palladium nanoflowers with enriched {100} facets for highly enhanced ethanol oxidation

Nanoscale ◽  
2014 ◽  
Vol 6 (24) ◽  
pp. 15090-15097 ◽  
Author(s):  
Kun Qi ◽  
Qiyu Wang ◽  
Weitao Zheng ◽  
Wei Zhang ◽  
Xiaoqiang Cui
Keyword(s):  
Catalytic Activity ◽  
Ethanol Oxidation ◽  
High Catalytic Activity ◽  
Single Crystalline ◽  
Growth Method ◽  
Seed Mediated

Palladium porous single-crystalline nanoflowers (PSNFs) with enriched high catalytic activity {100} facets were synthesized using a mild and controllable seed mediated growth method.

Synthesis of concave gold nanocuboids with high-index facets and their enhanced catalytic activity

2015 ◽  
Vol 51 (58) ◽  
pp. 11591-11594 ◽  
Author(s):  
Lidong Li ◽  
Yi Peng ◽  
Yonghai Yue ◽  
Ye Hu ◽  
Xiu Liang ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
High Index ◽  
Catalytic Activities ◽  
Growth Method ◽  
Seed Mediated

Novel concave gold nanocuboids bounded by 24 high-index {611} facets are synthesized using the seed-mediated growth method via an overgrowth mechanism, which exhibit excellent catalytic activities over certain reactions.

Nanoporous gold film: fabrication and role as a catalytic reactor

2015 ◽  
Vol 44 (26) ◽  
pp. 11929-11934 ◽  
Author(s):  
Youyi Xia ◽  
Xiang Deng ◽  
Shuxin Yan ◽  
Chang Gao ◽  
Cong Ma ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Gold Film ◽  
Nanoporous Gold ◽  
High Catalytic Activity ◽  
Catalytic Reactor ◽  
Hydrogenation Reactions ◽  
Film Fabrication ◽  
Seed Mediated

A thin NPG film with a thickness of 90 nm can be prepared on various substrates to form a catalytic reactor conveniently by using seed-mediated growth. Because of the nanoporous characterization, the film exhibits high catalytic activity both for oxidative and hydrogenation reactions.

Construction of kinked heteronanorods modified by metal nanoparticles with enhanced catalytic performance

2015 ◽  
Vol 51 (26) ◽  
pp. 5676-5678 ◽  
Author(s):  
Pan Yu ◽  
Tao-Tao Zhuang ◽  
Meng Sun ◽  
Liang Wu ◽  
Yi Li ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Metal Nanoparticles ◽  
Catalytic Performance ◽  
Growth Method ◽  
Seed Mediated ◽  
First Time

New kinked semiconductor–metal Au–Ag2S–ZnS and Au–Ag2S–ZnS–Au heteronanorods have been synthesized for the first time by a seed-mediated growth method and their catalytic activity has been investigated.

Ultrafine PtCuRh nanowire catalysts with alleviated poisoning effect for efficient ethanol oxidation

Nanoscale ◽  
2019 ◽  
Vol 11 (42) ◽  
pp. 20090-20095 ◽  
Author(s):  
Chunyan Chen ◽  
Hui Xu ◽  
Hongyuan Shang ◽  
Liujun Jin ◽  
Tongxin Song ◽  
...  
Keyword(s):  
Oxidation Reaction ◽  
Ethanol Oxidation ◽  
Ethanol Oxidation Reaction ◽  
Poisoning Effect ◽  
Electrocatalytic Performance ◽  
Growth Method ◽  
Alloy Nanowires ◽  
Seed Mediated

A robust and universal seed-mediated growth method has been developed for making a series of ultrafine PtCuM (M = Rh, Pd, Ir) alloy nanowires, which show greatly improved electrocatalytic performance for ethanol oxidation reaction.

Seed-mediated synthesis of dendritic platinum nanostructures with high catalytic activity for aqueous-phase hydrogenation of acetophenone

2015 ◽  
Vol 24 (5) ◽  
pp. 660-668 ◽  
Author(s):  
Yuan Yuan ◽  
Yusuf Valentino Kaneti ◽  
Minsu Liu ◽  
Fangzhu Jin ◽  
Danielle Frances Kennedy ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Aqueous Phase ◽  
High Catalytic Activity ◽  
Seed Mediated

Gas–liquid interface-mediated room-temperature synthesis of “clean” PdNiP alloy nanoparticle networks with high catalytic activity for ethanol oxidation

2014 ◽  
Vol 50 (85) ◽  
pp. 12877-12879 ◽  
Author(s):  
Rongfang Wang ◽  
Yuanyuan Ma ◽  
Hui Wang ◽  
Julian Key ◽  
Shan Ji
Keyword(s):  
Catalytic Activity ◽  
High Activity ◽  
Room Temperature ◽  
Ethanol Oxidation ◽  
Interface Reaction ◽  
Liquid Interface ◽  
High Catalytic Activity ◽  
Temperature Synthesis ◽  
Room Temperature Synthesis

PdNiP alloy nanoparticle networks prepared via a gas–liquid interface reaction had markedly high activity and durability for ethanol oxidation.

scholarly journals Facile Direct Seed-Mediated Growth of AuPt Bimetallic Shell on the Surface of Pd Nanocubes and Application for Direct H2O2 Synthesis

Catalysts ◽  
2020 ◽  
Vol 10 (6) ◽  
pp. 650 ◽  
Author(s):  
Geun-Ho Han ◽  
Ki Yoon Kim ◽  
Hyunji Nam ◽  
Hyeonjin Kim ◽  
Jihwan Yoon ◽  
...  
Keyword(s):  
Hydrogen Peroxide ◽  
Catalytic Activity ◽  
Direct Synthesis ◽  
H2o2 Production ◽  
Shell Nanoparticles ◽  
Growth Method ◽  
Bimetallic Layer ◽  
Seed Mediated ◽  
Selective Enhancement ◽  
Rich Content

The selective enhancement of catalytic activity is a challenging task, as catalyst modification is generally accompanied by both desirable and undesirable properties. For example, in the case of the direct synthesis of hydrogen peroxide, Pt on Pd improves hydrogen conversion, but lowers hydrogen peroxide selectivity, whereas Au on Pd enhances hydrogen peroxide selectivity but decreases hydrogen conversion. Toward an ideal catalytic property, the development of a catalyst that is capable of improving H-H dissociation for increasing H2 conversion, whilst suppressing O-O dissociation for high H2O2 selectivity would be highly beneficial. Pd-core AuPt-bimetallic shell nanoparticles with a nano-sized bimetallic layer composed of Au-rich or Pt-rich content with Pd cubes were readily prepared via the direct seed-mediated growth method. In the Pd-core AuPt-bimetallic shell nanoparticles, Au was predominantly located on the {100} facets of the Pd nanocubes, whereas Pt was deposited on the corners of the Pd nanocubes. The evaluation of Pd-core AuPt-bimetallic shell nanoparticles with varying Au and Pt contents revealed that Pd-core AuPt-bimetallic shell that was composed of 2.5 mol% Au and 5 mol% Pt, in relation to Pd, exhibited the highest H2O2 production rate (914 mmol H2O2 gmetal−1 h−1), due to the improvement of both H2O2 selectivity and H2 conversion.

Preparation and characterization of porous sponge-like Pd@Pt nanotubes with high catalytic activity for ethanol oxidation

2016 ◽  
Vol 173 ◽  
pp. 43-46 ◽  
Author(s):  
Wucheng Luo ◽  
Haihui Zhou ◽  
Chaopeng Fu ◽  
Zhongyuan Huang ◽  
Na Gao ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Ethanol Oxidation ◽  
High Catalytic Activity

Enhanced catalytic activity of low-Pt content nanocatalysts supported on hollow carbon spheres for the ORR in alkaline media

MRS Advances ◽  
2020 ◽  
Vol 5 (57-58) ◽  
pp. 2961-2972
Author(s):  
P.C. Meléndez-González ◽  
E. Garza-Duran ◽  
J.C. Martínez-Loyola ◽  
P. Quintana-Owen ◽  
I.L. Alonso-Lemus ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Anion Exchange ◽  
Average Particle Size ◽  
Synthesis Method ◽  
Alkaline Media ◽  
High Catalytic Activity ◽  
Average Particle ◽  
Carbon Spheres ◽  
Hollow Carbon ◽  
Hollow Carbon Spheres

In this work, low-Pt content nanocatalysts (≈ 5 wt. %) supported on Hollow Carbon Spheres (HCS) were synthesized by two routes: i) colloidal conventional polyol, and ii) surfactant-free Bromide Anion Exchange (BAE). The nanocatalysts were labelled as Pt/HCS-P and Pt/HCS-B for polyol and BAE, respectively. The physicochemical characterization of the nanocatalysts showed that by following both methods, a good control of chemical composition was achieved, obtaining in addition well dispersed nanoparticles of less than 3 nm TEM average particle size (d) on the HCS. Pt/HCS-B contained more Pt0 species than Pt/HCS-P, an effect of the synthesis method. In addition, the structure of the HCS remains more ordered after BAE synthesis, compared to polyol. Regarding the catalytic activity for the Oxygen Reduction Reaction (ORR) in 0.5 M KOH, Pt/HCS-P and Pt/HCS-B showed a similar performance in terms of current density (j) at 0.9 V vs. RHE than the benchmark commercial 20 wt. % Pt/C. However, Pt/HCS-P and Pt/HCS-B demonstrated a 6 and 5-fold increase in mass catalytic activity compared to Pt/C, respectively. A positive effect of the high specific surface area of the HCS and its interactions with metal nanoparticles and electrolyte, which promoted the mass transfer, increased the performance of Pt/HCS-P and Pt/HCS-B. The high catalytic activity showed by Pt/HCS-B and Pt/HCS-P for the ORR, even with a low-Pt content, make them promising cathode nanocatalysts for Anion Exchange Membrane Fuel Cells (AEMFC).

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