scholarly journals Key Role of Anionic Doping for H2 Production from Formic Acid on Pd(111)

ACS Catalysis ◽  
2017 ◽  
Vol 7 (3) ◽  
pp. 1955-1959 ◽  
Author(s):  
Pei Wang ◽  
Stephan N. Steinmann ◽  
Gang Fu ◽  
Carine Michel ◽  
Philippe Sautet
Keyword(s):  
Formic Acid ◽  
H2 Production

scholarly journals From Homogeneous to Heterogenized Molecular Catalysts for H2 Production by Formic Acid Dehydrogenation: Mechanistic Aspects, Role of Additives, and Co-Catalysts

Energies ◽  
2020 ◽  
Vol 13 (3) ◽  
pp. 733 ◽  
Author(s):  
Panagiota Stathi ◽  
Maria Solakidou ◽  
Maria Louloudi ◽  
Yiannis Deligiannakis
Keyword(s):  
Formic Acid ◽  
Sodium Formate ◽  
H2 Production ◽  
Ambient Conditions ◽  
Co Catalysts ◽  
High Concentrations ◽  
Formic Acid Dehydrogenation ◽  
Key Steps ◽  
Molecular Catalysts

H2 production via dehydrogenation of formic acid (HCOOH, FA), sodium formate (HCOONa, SF), or their mixtures, at near-ambient conditions, T < 100 °C, P = 1 bar, is intensively pursued, in the context of the most economically and environmentally eligible technologies. Herein we discuss molecular catalysts (ML), consisting of a metal center (M, e.g., Ru, Ir, Fe, Co) and an appropriate ligand (L), which exemplify highly efficient Turnover Numbers (TONs) and Turnover Frequencies (TOFs) in H2 production from FA/SF. Typically, many of these ML catalysts require the presence of a cofactor that promotes their optimal cycling. Thus, we distinguish the concept of such cofactors in additives vs. co-catalysts: When used at high concentrations, that is stoichiometric amounts vs. the substrate (HCOONa, SF), the cofactors are sacrificial additives. In contrast, co-catalysts are used at much lower concentrations, that is at stoichiometric amount vs. the catalyst. The first part of the present review article discusses the mechanistic key steps and key controversies in the literature, taking into account theoretical modeling data. Then, in the second part, the role of additives and co-catalysts as well as the role of the solvent and the eventual inhibitory role of H2O are discussed in connection to the main mechanistic steps. For completeness, photons used as activators of ML catalysts are also discussed in the context of co-catalysts. In the third part, we discuss examples of promising hybrid nanocatalysts, consisting of a molecular catalyst ML attached on the surface of a nanoparticle. In the same context, we discuss nanoparticulate co-catalysts and hybrid co-catalysts, consisting of catalyst attached on the surface of a nanoparticle, and their role in the performance of molecular catalysts ML.

Disclosing the role of Gold on Palladium ‐ Gold alloyed supported catalysts in formic acid decomposition

ChemCatChem ◽  
2021 ◽  
Author(s):  
Alberto Villa ◽  
Ilaria Barlocco ◽  
Sofia Capelli ◽  
Xiuyuan Lu ◽  
Silvio Bellomi ◽  
...  
Keyword(s):  
Formic Acid ◽  
Supported Catalysts ◽  
Acid Decomposition ◽  
Formic Acid Decomposition

scholarly journals Selectivity Effects in Bimetallic Catalysis: Role of the Metal Sites in the Decomposition of Formic Acid into H2and CO2by the Coinage Metal Binuclear Complexes [dppmMM′(H)]+

ChemCatChem ◽  
2017 ◽  
Vol 9 (7) ◽  
pp. 1298-1302 ◽  
Author(s):  
Athanasios Zavras ◽  
Marjan Krstić ◽  
Philippe Dugourd ◽  
Vlasta Bonačić-Koutecký ◽  
Richard A. J. O'Hair
Keyword(s):  
Formic Acid ◽  
Binuclear Complexes ◽  
Coinage Metal ◽  
Bimetallic Catalysis

scholarly journals The role of formic acid/formate equilibria in the oxidation of formic acid on Pt (111)

2019 ◽  
Vol 98 ◽  
pp. 10-14 ◽  
Author(s):  
Carlos Busó-Rogero ◽  
Adolfo Ferre-Vilaplana ◽  
Enrique Herrero ◽  
Juan M. Feliu
Keyword(s):  
Formic Acid

H2/O2 Cycles: Thermodynamic Potentialities and Limits

2003 ◽  
Author(s):  
M. Gambini ◽  
G. L. Guizzi ◽  
M. Vellini
Keyword(s):  
Production Systems ◽  
Renewable Energy Sources ◽  
H2 Production ◽  
Thermodynamic Cycles ◽  
A Value ◽  
Overall Performance ◽  
Definition Of ◽  
Working Parameters ◽  
O2 Production

In this paper, the thermodynamic potentialities and limits of the H2/O2 cycles are investigated. Starting from the conventional gas turbine and steam turbine technology, the paper qualitatively tackles problems related to a change of oxidizer and fuel: from these considerations, an internal combustion steam cycle (ICSC) is analyzed where steam, injected in the combustion chamber together with oxygen and hydrogen, is produced in a regenerative way and plays the important role of inert. A proper parametric analysis is then performed in order to evaluate the influence of the main working parameters on the overall performance of H2/O2 cycles. All the results are carried out neglecting the energy requirements for O2 and H2 production systems, but taking into account their work compression only. This choice permits great freedom in the definition of these thermodynamic cycles and allows general considerations because there is no need of any specification about H2 and/or O2 production systems and their integration with thermodynamic cycles. Therefore this paper can be framed in a context of oxygen and hydrogen centralized production (by nuclear or renewable energy sources for example) and in their distribution as pure gases in the utilization place. Adopting realistic assumptions, TIT of about 1350°C, the potentialities of H2/O2 cycles are very limited: the net efficiency attains a value of about 50%. Instead, adopting futurist assumptions, TIT = I700°C, a different H2/O2 cycle scheme can be proposed and more interesting performance is attained (a net efficiency value over 60%). The thermodynamic and technological aspects are completely addressed in the paper, underlining the great importance of the choice of the main working parameters.

Probing the peripheral role of amines in photo- and electrocatalytic H2 production by molecular cobalt complexes

2020 ◽  
Vol 56 (94) ◽  
pp. 14841-14844
Author(s):  
Dependu Dolui ◽  
Ab Qayoom Mir ◽  
Arnab Dutta
Keyword(s):  
Primary Amine ◽  
Cobalt Complexes ◽  
H2 Production ◽  
Amine Group ◽  
Primary Amine Group

The photo- and electrocatalytic H2 production by the cobaloxime core improves in the presence of a primary amine group in the periphery.

Surface diffusion of poisoning species during CO and formic acid oxidation on PtAu surface. The key role of the active site

2021 ◽  
Vol 483 ◽  
pp. 229189
Author(s):  
Daniela Minudri ◽  
Alvaro Y. Tesio ◽  
Florencia Fungo ◽  
Rodrigo E. Palacios ◽  
Paula S. Cappellari ◽  
...  
Keyword(s):  
Formic Acid ◽  
Surface Diffusion ◽  
Active Site ◽  
Formic Acid Oxidation ◽  
Acid Oxidation
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