Photocatalytic Water Splitting

Authored by: Junwang Tang , Alexander J. Cowan

CRC Handbook of Organic Photochemistry and Photobiology

Print publication date:  March  2012
Online publication date:  March  2012

Print ISBN: 9781439899335
eBook ISBN: 9781466561250
Adobe ISBN:

10.1201/b12252-37

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Abstract

The global annual energy consumption is predicted to rise from 13.5 TW/year (2001) to 27 TW/year by 2050 and triple by the end of the century. 1,2 This massive increase in demand is driven by both the predicted rapid economic growth in the developing world and an overall increase in the global population. Currently, the vast majority of energy is obtained through the combustion of fossil fuels with nuclear, hydroelectric, biomass, and renewable energy (solar, wind, wave, and tide), contributing a combined total of less than 15% of the required demand. 3 The limited fossil fuel reserves, coupled to acute environ-mental concerns related to their utilization, is the driving force behind the development of renewable and clean energy resource. Solar energy represents the most abundant energy source on the planet, with 100,000 TW/year of energy reaching the earth’s surface. 3 The ability to capture this energy efficiently and store it in the form of a chemical fuel, allowing for its later use in dark periods, is a key goal for researchers. Development of this technology would offer access to a clean renewable source of fuels and would remove our dependence on fossil fuels.

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