skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Covalent Attachment of the Water‐insoluble Ni(P Cy 2 N Phe 2 ) 2 Electrocatalyst to Electrodes Showing Reversible Catalysis in Aqueous Solution

Journal Article · · Electroanalysis
 [1];  [2];  [3];  [4];  [1];  [2];  [1]
  1. Max Planck Institute für Chemische Energiekonversion Stiftstr. 34–36 45470 Mülheim an der Ruhr Germany
  2. Pacific Northwest National Laboratory 902 Battelle Blvd. Richland WA 99354 USA
  3. Pacific Northwest National Laboratory 902 Battelle Blvd. Richland WA 99354 USA, Chemistry Department IIT Gandhinagar Ahmedabad 382424 India
  4. Max-Planck-Institut für Kohlenforschung Kaiser-Wilhelm-Platz 1 45470 Mülheim an der Ruhr Germany

Abstract Hydrogenases are a diverse group of metalloenzymes which catalyze the reversible conversion between molecular hydrogen and protons at high rates. The catalytic activity of these enzymes does not require overpotential because their active site has been evolutionarily optimized to operate fast and efficiently. These enzymes have inspired the development of molecular catalysts, which have dramatically improved in efficiency in recent years, to the point that some synthetic catalysts even outperform hydrogenases under certain conditions. In this work, we use a reversible noble‐metal‐free homogeneous catalyst, the [Ni(P Cy 2 N Phe 2 ) 2 ] 2+ complex, and we covalently immobilize it on a functionalized highly oriented pyrolytic graphite “edge” (HOPG e ) electrode surface. This catalyst is not water soluble, but once it is surface‐confined on the electrode, it maintains its catalytic properties in aqueous solutions, showing reversibility for H 2 oxidation/reduction. Immobilization of the [Ni(P Cy 2 N Phe 2 ) 2 ] 2+ complex onto a multi‐walled carbon nanotubes coated electrode leads to even higher catalytic current densities and enhanced stability.

Sponsoring Organization:
USDOE
OSTI ID:
1401000
Journal Information:
Electroanalysis, Journal Name: Electroanalysis Vol. 28 Journal Issue: 10; ISSN 1040-0397
Publisher:
Wiley Blackwell (John Wiley & Sons)Copyright Statement
Country of Publication:
Germany
Language:
English
Citation Metrics:
Cited by: 12 works
Citation information provided by
Web of Science

References (29)

Chemical approaches to artificial photosynthesis journal September 2012
A Hydrogen-Evolving Ni(P 2 N 2 ) 2 Electrocatalyst Covalently Attached to a Glassy Carbon Electrode: Preparation, Characterization, and Catalysis. Comparisons with the Homogeneous Analogue journal June 2014
Dynamic electrochemical investigations of hydrogen oxidation and production by enzymes and implications for future technology journal January 2009
Versatile Photocatalytic Systems for H 2 Generation in Water Based on an Efficient DuBois-Type Nickel Catalyst journal December 2013
Powering the planet: Chemical challenges in solar energy utilization journal October 2006
Self-assembling hydrogel scaffolds for photocatalytic hydrogen production journal October 2014
Biomimetic assembly and activation of [FeFe]-hydrogenases journal June 2013
Minimal Proton Channel Enables H 2 Oxidation and Production with a Water-Soluble Nickel-Based Catalyst journal November 2013
Reduction of oxygen catalyzed by nickel diphosphine complexes with positioned pendant amines journal January 2010
Photocatalytic Hydrogen Production using Polymeric Carbon Nitride with a Hydrogenase and a Bioinspired Synthetic Ni Catalyst journal September 2014
Arginine-Containing Ligands Enhance H 2 Oxidation Catalyst Performance journal May 2014
Proton reduction by molecular catalysts in water under demanding atmospheres journal January 2014
Catalytic Turnover of [FeFe]-Hydrogenase Based on Single-Molecule Imaging journal October 2011
Molecular Electrocatalysts for the Oxidation of Hydrogen and the Production of Hydrogen - The Role of Pendant Amines as Proton Relays journal January 2011
The roles of the first and second coordination spheres in the design of molecular catalysts for H 2 production and oxidation journal January 2009
Direct Comparison of the Performance of a Bio-inspired Synthetic Nickel Catalyst and a [NiFe]-Hydrogenase, Both Covalently Attached to Electrodes journal July 2015
Conformational Dynamics and Proton Relay Positioning in Nickel Catalysts for Hydrogen Production and Oxidation journal November 2013
Moving Protons with Pendant Amines: Proton Mobility in a Nickel Catalyst for Oxidation of Hydrogen journal September 2011
Hydrogenase-Coated Carbon Nanotubes for Efficient H 2 Oxidation journal June 2007
Hydrogen Oxidation and Production Using Nickel-Based Molecular Catalysts with Positioned Proton Relays journal January 2006
From Hydrogenases to Noble Metal-Free Catalytic Nanomaterials for H2 Production and Uptake journal December 2009
Amide bond formation: beyond the myth of coupling reagents journal January 2009
A noble metal-free proton-exchange membrane fuel cell based on bio-inspired molecular catalysts journal January 2015
Amino acid modified Ni catalyst exhibits reversible H 2 oxidation/production over a broad pH range at elevated temperatures journal November 2014
Efficient solar-to-fuels production from a hybrid microbial–water-splitting catalyst system journal February 2015
Bio-inspired noble metal-free nanomaterials approaching platinum performances for H 2 evolution and uptake journal January 2016
Further characterization of the [Fe]-hydrogenase from Desulfovibrio desulfuricans ATCC 7757 journal October 1992
Hydrogenases journal March 2014
14N HYSCORE investigation of the H-cluster of [FeFe] hydrogenase: evidence for a nitrogen in the dithiol bridge journal January 2009