Adsorption isobar of H2 on Pt catalyst

1992 ◽  
Vol 46 (1) ◽  
pp. 233-239
Author(s):  
Sun Yunhan ◽  
Li Yongwang ◽  
Chen Songying ◽  
Peng Shaoyi
Keyword(s):  
Pt Catalyst ◽  
Adsorption Isobar

Dehydrogenation of Bicyclohexyl on a Pt-Catalyst on the Basis of Oxidized Carbon Nanotubes

2018 ◽  
Vol 482 (1) ◽  
pp. 52-55
Author(s):  
A. Kalenchuk ◽  
◽  
S. Chernyak ◽  
V. Bogdan ◽  
V. Lunin ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Pt Catalyst ◽  
Oxidized Carbon ◽  
Oxidized Carbon Nanotubes

Peculiarities of high-pressure hydrogen adsorption on Pt catalyzed Cu-BTC metal–organic framework

2021 ◽  
Vol 23 (7) ◽  
pp. 4277-4286
Author(s):  
S. V. Chuvikov ◽  
E. A. Berdonosova ◽  
A. Krautsou ◽  
J. V. Kostina ◽  
V. V. Minin ◽  
...  
Keyword(s):  
High Pressure ◽  
High Pressures ◽  
Hydrogen Adsorption ◽  
Metal Organic Framework ◽  
Pt Catalyst ◽  
Metal Organic ◽  
Pt Catalyzed ◽  
Pressure Hydrogen ◽  
Organic Framework

Pt-Catalyst plays a key role in hydrogen adsorption by Cu-BTC at high pressures.

scholarly journals High-throughput computational-experimental screening protocol for the discovery of bimetallic catalysts

2021 ◽  
Vol 7 (1) ◽  
Author(s):  
Byung Chul Yeo ◽  
Hyunji Nam ◽  
Hyobin Nam ◽  
Min-Cheol Kim ◽  
Hong Woo Lee ◽  
...  
Keyword(s):  
High Throughput ◽  
Bimetallic Catalysts ◽  
High Throughput Screening ◽  
Direct Synthesis ◽  
Catalytic Performance ◽  
Platinum Group Metals ◽  
Pt Catalyst ◽  
Electronic Density ◽  
Bimetallic Alloy ◽  
Screening Protocol

AbstractTo accelerate the discovery of materials through computations and experiments, a well-established protocol closely bridging these methods is required. We introduce a high-throughput screening protocol for the discovery of bimetallic catalysts that replace palladium (Pd), where the similarities in the electronic density of states patterns were employed as a screening descriptor. Using first-principles calculations, we screened 4350 bimetallic alloy structures and proposed eight candidates expected to have catalytic performance comparable to that of Pd. Our experiments demonstrate that four bimetallic catalysts indeed exhibit catalytic properties comparable to those of Pd. Moreover, we discover a bimetallic (Ni-Pt) catalyst that has not yet been reported for H2O2 direct synthesis. In particular, Ni61Pt39 outperforms the prototypical Pd catalyst for the chemical reaction and exhibits a 9.5-fold enhancement in cost-normalized productivity. This protocol provides an opportunity for the catalyst discovery for the replacement or reduction in the use of the platinum-group metals.

scholarly journals Degradation Investigation of Electrocatalyst in Proton Exchange Membrane Fuel Cell at a High Energy Efficiency

Molecules ◽  
2021 ◽  
Vol 26 (13) ◽  
pp. 3932
Author(s):  
Jie Song ◽  
Qing Ye ◽  
Kun Wang ◽  
Zhiyuan Guo ◽  
Meiling Dou
Keyword(s):  
Energy Efficiency ◽  
Single Cell ◽  
Proton Exchange Membrane ◽  
Cell Voltage ◽  
High Energy ◽  
Proton Exchange ◽  
Pt Catalyst ◽  
Operation Conditions ◽  
High Efficient ◽  
Exchange Membrane

The development of high efficient stacks is critical for the wide spread application of proton exchange membrane fuel cells (PEMFCs) in transportation and stationary power plant. Currently, the favorable operation conditions of PEMFCs are with single cell voltage between 0.65 and 0.7 V, corresponding to energy efficiency lower than 57%. For the long term, PEMFCs need to be operated at higher voltage to increase the energy efficiency and thus promote the fuel economy for transportation and stationary applications. Herein, PEMFC single cell was investigated to demonstrate its capability to working with voltage and energy efficiency higher than 0.8 V and 65%, respectively. It was demonstrated that the PEMFC encountered a significant performance degradation after the 64 h operation. The cell voltage declined by more than 13% at the current density of 1000 mA cm−2, due to the electrode de-activation. The high operation potential of the cathode leads to the corrosion of carbon support and then causes the detachment of Pt nanoparticles, resulting in significant Pt agglomeration. The catalytic surface area of cathode Pt is thus reduced for oxygen reduction and the cell performance decreased. Therefore, electrochemically stable Pt catalyst is highly desirable for efficient PEMFCs operated under cell voltage higher than 0.8 V.

Rapid bleaching of photoelectrochromic device by the simple addition of Pt catalyst in WO3 layer

2021 ◽  
Vol 224 ◽  
pp. 110990
Author(s):  
Saad Sarwar ◽  
Sunghyeok Park ◽  
Thuy Thi Dao ◽  
Sungjun Hong ◽  
Chi-Hwan Han
Keyword(s):  
Pt Catalyst ◽  
Simple Addition

Study of the CA-treated ZSM-22 zeolite with enhanced catalytic performance in the hydroisomerization of long-chain n-dodecane

2021 ◽  
Author(s):  
Liwen He ◽  
Wenqian Fu ◽  
Leyi Li ◽  
Yuxian Huang ◽  
Liyu Chen ◽  
...  
Keyword(s):  
Catalytic Performance ◽  
Molar Concentration ◽  
Pt Catalyst ◽  
Long Chain

In this study, Pt catalyst on series of ZSM-22 zeolites treated by citric (CA) solution with different molar concentration (Pt/ZSM-22-CA-x, x=0,1, 2, and 3) was prepared, and evaluated in the...

scholarly journals A Molecular Model of PEMFC Catalyst Layer: Simulation on Reactant Transport and Thermal Conduction

Membranes ◽  
2021 ◽  
Vol 11 (2) ◽  
pp. 148
Author(s):  
Wenkai Wang ◽  
Zhiguo Qu ◽  
Xueliang Wang ◽  
Jianfei Zhang
Keyword(s):  
Thermal Conductivity ◽  
Proton Exchange Membrane ◽  
Molecular Model ◽  
Phase Interface ◽  
Catalyst Layer ◽  
Md Simulations ◽  
Distribution Functions ◽  
Proton Exchange ◽  
Pt Catalyst ◽  
Reaction Efficiency

Minimizing platinum (Pt) loading while reserving high reaction efficiency in the catalyst layer (CL) has been confirmed as one of the key issues in improving the performance and application of proton exchange membrane fuel cells (PEMFCs). To enhance the reaction efficiency of Pt catalyst in CL, the interfacial interactions in the three-phase interface, i.e., carbon, Pt, and ionomer should be first clarified. In this study, a molecular model containing carbon, Pt, and ionomer compositions is built and the radial distribution functions (RDFs), diffusion coefficient, water cluster morphology, and thermal conductivity are investigated after the equilibrium molecular dynamics (MD) and nonequilibrium MD simulations. The results indicate that increasing water content improves water aggregation and cluster interconnection, both of which benefit the transport of oxygen and proton in the CL. The growing amount of ionomer promotes proton transport but generates additional resistance to oxygen. Both the increase of water and ionomer improve the thermal conductivity of the C. The above-mentioned findings are expected to help design catalyst layers with optimized Pt content and enhanced reaction efficiency, and further improve the performance of PEMFCs.

Superior Long-Term Stability of a Mesoporous Alumina-Supported Pt Catalyst in the Hydrodeoxygenation of Palm Oil

2021 ◽  
Vol 9 (3) ◽  
pp. 1193-1202
Author(s):  
Hwiram Jeong ◽  
Hari Babu Bathula ◽  
Tae Wan Kim ◽  
Gi Bo Han ◽  
Jung Hee Jang ◽  
...  
Keyword(s):  
Palm Oil ◽  
Mesoporous Alumina ◽  
Pt Catalyst ◽  
Term Stability ◽  
Long Term Stability ◽  
Supported Pt Catalyst
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