Evaluation of catalytic properties of tungsten carbide for the anode of microbial fuel cells

Abstract In this communication we discuss the properties of tungsten carbide, WC, as anodic electrocatalyst for microbial fuel cell application. The electrocatalytic activity of tungsten carbide is evaluated in the light of its preparation procedure, its structural properties as well as the pH and the composition of the anolyte solution and the catalyst load. The activity of the noble-metal-free electrocatalyst towards the oxidation of several common microbial fermentation products (hydrogen, formate, lactate, ethanol) is studied for microbial fuel cell conditions (e.g., pH 5, room temperature and ambient pressure). Current densities of up to 8.8 mA cm−2 are achieved for hydrogen (hydrogen saturated electrolyte solution), and up to 2 mA cm−2 for formate and lactate, respectively. No activity was observed for ethanol electrooxidation. The electrocatalytic activity and chemical stability of tungsten carbide is excellent in acidic to pH neutral potassium chloride electrolyte solutions, whereas higher phosphate concentrations at neutral pH support an oxidative degradation.

[1]  D. V. Sokolsky,et al.  On adsorption and electro-oxidation of some compounds on tungsten carbide; their effect on hydrogen electro-oxidation , 1977 .

[2]  Uwe Schröder,et al.  Fluorinated polyanilines as superior materials for electrocatalytic anodes in bacterial fuel cells , 2004 .

[3]  Andrew G. Glen,et al.  APPL , 2001 .

[4]  D. Collins,et al.  Power Sources 3 , 1971 .

[5]  P. Stonehart,et al.  The relation of surface structure to the electrocatalytic activity of tungsten carbide , 1977 .

[6]  W. Verstraete,et al.  Biofuel Cells Select for Microbial Consortia That Self-Mediate Electron Transfer , 2004, Applied and Environmental Microbiology.

[7]  G. G. Stokes.  "J." , 1890, The New Yale Book of Quotations.

[8]  R. Compton,et al.  Nanotrench arrays reveal insight into graphite electrochemistry. , 2005, Angewandte Chemie.

[9]  Uwe Schröder,et al.  Heat treated soil as convenient and versatile source of bacterial communities for microbial electricity generation , 2006 .

[10]  Uwe Schröder,et al.  Application of pyrolysed iron(II) phthalocyanine and CoTMPP based oxygen reduction catalysts as cathode materials in microbial fuel cells , 2005 .

[11]  A. Vijh,et al.  From Electrocatalysis to Fuel Cells , 1973 .

[12]  U. Schröder,et al.  Electrochemistry of Immobilized Particles and Droplets , 2005 .

[13]  D. Baresel,et al.  Tungsten Carbide as Anode Material for Fuel Cells , 1971 .

[14]  Hong Liu,et al.  Production of electricity during wastewater treatment using a single chamber microbial fuel cell. , 2004, Environmental science & technology.

[15]  Chun’an Ma,et al.  Preparation of nano-crystalline tungsten carbide thin film electrode and its electrocatalytic activity for hydrogen evolution , 2005 .

[16]  A. Vossen,et al.  Effect of carbon monoxide on the electrooxidation of hydrogen by tungsten carbide , 2002 .

[17]  Uwe Schröder,et al.  In situ electrooxidation of photobiological hydrogen in a photobioelectrochemical fuel cell based on Rhodobacter sphaeroides. , 2005, Environmental science & technology.

[18]  W. Verstraete,et al.  A microbial fuel cell capable of converting glucose to electricity at high rate and efficiency , 2004, Biotechnology Letters.

[19]  P. Żółtowski.  The mechanism of the activation process of the tungsten carbide electrode , 1986 .

[20]  Miss A.O. Penney.  (b) , 1974, The New Yale Book of Quotations.

[21]  Uwe Schröder,et al.  Utilizing the green alga Chlamydomonas reinhardtii for microbial electricity generation: a living solar cell , 2005, Applied Microbiology and Biotechnology.

[22]  Byung Hong Kim,et al.  Enrichment of microbial community generating electricity using a fuel-cell-type electrochemical cell , 2004, Applied Microbiology and Biotechnology.

[23]  D. Lovley,et al.  Electricity generation by direct oxidation of glucose in mediatorless microbial fuel cells , 2003, Nature Biotechnology.

[24]  Derek R. Lovley,et al.  Biofilm and Nanowire Production Leads to Increased Current in Geobacter sulfurreducens Fuel Cells , 2006, Applied and Environmental Microbiology.

[25]  H. Böhm,et al.  Wasserstoffoxidation an verschiedenen wolframcarbidmaterialien , 1977 .

[26]  Alice Dohnalkova,et al.  Electrically conductive bacterial nanowires produced by Shewanella oneidensis strain MR-1 and other microorganisms. , 2006, Proceedings of the National Academy of Sciences of the United States of America.

[27]  Uwe Schröder,et al.  Exploiting complex carbohydrates for microbial electricity generation: a bacterial fuel cell operating on starch , 2004 .

[28]  F. Harnisch,et al.  Gaining electricity from in situ oxidation of hydrogen produced by fermentative cellulose degradation , 2005, Letters in applied microbiology.

[29]  B. Delmon,et al.  Control of the catalytic activity of tungsten carbides: II. Physicochemical characterizations of tungsten carbides , 1986 .

[30]  H. Böhm.  Adsorption und anodische oxydation von wasserstoff an wolframcarbid , 1970 .

[31]  D. R. Bond,et al.  Electrode-Reducing Microorganisms That Harvest Energy from Marine Sediments , 2002, Science.

[32]  H. Binder,et al.  Electrochemical Oxidation of Aldehydes, Formic Acid, and Carbon Monoxide at Tungsten Carbide Electrodes in 2 N Sulfuric Acid , 1969 .

[33]  Feng Zhao,et al.  Interfacing electrocatalysis and biocatalysis with tungsten carbide: a high-performance, noble-metal-free microbial fuel cell. , 2006, Angewandte Chemie.