TY - JOUR

T1 - Inverted Fuel Cell

T2 - Room-Temperature Hydrogen Separation from an Exhaust Gas by Using a Commercial Short-Circuited PEM Fuel Cell without Applying any Electrical Voltage

AU - Friebe, Sebastian

AU - Geppert, Benjamin

AU - Caro, Jürgen

PY - 2015/6/24

Y1 - 2015/6/24

N2 - A short-circuited PEM fuel cell with a Nafion membrane has been evaluated in the roomerature separation of hydrogen from exhaust gas streams. The separated hydrogen can be recovered or consumed in an in situ olefin hydrogenation when the fuel cell is operated as catalytic membrane reactor. Without applying an outer electrical voltage, there is a continuous hydrogen flux from the higher to the lower hydrogen partial pressure side through the Nafion membrane. On the feed side of the Nafion membrane, hydrogen is catalytically split into protons and electrons by the Pt/C electrocatalyst. The protons diffuse through the Nafion membrane, the electrons follow the short-circuit between the two brass current collectors. On the cathode side, protons and electrons recombine, and hydrogen is released. Fuel cell turned on its head: A short-circuited PEM fuel cell with a Nafion membrane can separate hydrogen from exhaust gases of different compositions at room temperature. The permeated hydrogen can either be obtained using an inert flushing gas or used directly in catalytic hydrogenations or combustion processes with reactive flushing gases.

AB - A short-circuited PEM fuel cell with a Nafion membrane has been evaluated in the roomerature separation of hydrogen from exhaust gas streams. The separated hydrogen can be recovered or consumed in an in situ olefin hydrogenation when the fuel cell is operated as catalytic membrane reactor. Without applying an outer electrical voltage, there is a continuous hydrogen flux from the higher to the lower hydrogen partial pressure side through the Nafion membrane. On the feed side of the Nafion membrane, hydrogen is catalytically split into protons and electrons by the Pt/C electrocatalyst. The protons diffuse through the Nafion membrane, the electrons follow the short-circuit between the two brass current collectors. On the cathode side, protons and electrons recombine, and hydrogen is released. Fuel cell turned on its head: A short-circuited PEM fuel cell with a Nafion membrane can separate hydrogen from exhaust gases of different compositions at room temperature. The permeated hydrogen can either be obtained using an inert flushing gas or used directly in catalytic hydrogenations or combustion processes with reactive flushing gases.

KW - electrocatalysis

KW - fuel cells

KW - hydrogen

KW - membrane

KW - separation

UR - http://www.scopus.com/inward/record.url?scp=85027945082&partnerID=8YFLogxK

U2 - 10.1002/anie.201500751

DO - 10.1002/anie.201500751

M3 - Article

AN - SCOPUS:85027945082

VL - 54

SP - 7790

EP - 7794

JO - Angewandte Chemie - International Edition

JF - Angewandte Chemie - International Edition

SN - 1433-7851

IS - 27

ER -