3 research outputs found
Hierarchical Polyoxometallate Confined in Woven Thin Films for Single-Cluster Catalysis: Simplified Electrodes for Far-Fetched O<sub>2</sub> Evolution from Seawater
The highly anticipated artificial conversion of water
to oxygen
for the imperishable growth of renewable energy requires efficient
water oxidation catalysts (WOCs) to drive the exciting 4e– transformation at low driving potentials. Herein, we describe the
freestanding thin film of P5Q7 (TFPQ), where
Preyssler [P5W30O110]14– (P5) clusters are woven with [CH3(CH2)6]4N(Br) chains (Q7) to confine
P5 clusters and maximize its catalytic exposure. The TFPQ-supported
electrode shows OER at record-low overpotentials at 10 mAcm2 (η10 = 130 and 490 mV), rapid migration of electrons
(Tafel, 35 and 56 mVdec–1), turnover frequency (TOF,
8.55 s–1), in alkaline water (1 M KOH), and natural
seawater, respectively. Evenly dispersed and confined conducting P5 clusters with a delocalized charge cloud shows ∼3
times lower η10 and eventually high OER efficiency
than nonconfined clusters. The TFPQ electrodes showed a prolonged
stability of minimum 1000 cycles in alkaline water and seawater, without
the leaching of true catalytic species P5
Hierarchical Polyoxometallate Confined in Woven Thin Films for Single-Cluster Catalysis: Simplified Electrodes for Far-Fetched O<sub>2</sub> Evolution from Seawater
The highly anticipated artificial conversion of water
to oxygen
for the imperishable growth of renewable energy requires efficient
water oxidation catalysts (WOCs) to drive the exciting 4e– transformation at low driving potentials. Herein, we describe the
freestanding thin film of P5Q7 (TFPQ), where
Preyssler [P5W30O110]14– (P5) clusters are woven with [CH3(CH2)6]4N(Br) chains (Q7) to confine
P5 clusters and maximize its catalytic exposure. The TFPQ-supported
electrode shows OER at record-low overpotentials at 10 mAcm2 (η10 = 130 and 490 mV), rapid migration of electrons
(Tafel, 35 and 56 mVdec–1), turnover frequency (TOF,
8.55 s–1), in alkaline water (1 M KOH), and natural
seawater, respectively. Evenly dispersed and confined conducting P5 clusters with a delocalized charge cloud shows ∼3
times lower η10 and eventually high OER efficiency
than nonconfined clusters. The TFPQ electrodes showed a prolonged
stability of minimum 1000 cycles in alkaline water and seawater, without
the leaching of true catalytic species P5
Hierarchical Polyoxometallate Confined in Woven Thin Films for Single-Cluster Catalysis: Simplified Electrodes for Far-Fetched O<sub>2</sub> Evolution from Seawater
The highly anticipated artificial conversion of water
to oxygen
for the imperishable growth of renewable energy requires efficient
water oxidation catalysts (WOCs) to drive the exciting 4e– transformation at low driving potentials. Herein, we describe the
freestanding thin film of P5Q7 (TFPQ), where
Preyssler [P5W30O110]14– (P5) clusters are woven with [CH3(CH2)6]4N(Br) chains (Q7) to confine
P5 clusters and maximize its catalytic exposure. The TFPQ-supported
electrode shows OER at record-low overpotentials at 10 mAcm2 (η10 = 130 and 490 mV), rapid migration of electrons
(Tafel, 35 and 56 mVdec–1), turnover frequency (TOF,
8.55 s–1), in alkaline water (1 M KOH), and natural
seawater, respectively. Evenly dispersed and confined conducting P5 clusters with a delocalized charge cloud shows ∼3
times lower η10 and eventually high OER efficiency
than nonconfined clusters. The TFPQ electrodes showed a prolonged
stability of minimum 1000 cycles in alkaline water and seawater, without
the leaching of true catalytic species P5