In a joint statement at informal international talks in Berlin, the European Union's two biggest economies also urged other countries to do their part in helping achieve a global push to cut emissions.
France and Germany have "firmly decided to take all efforts to reach an ambitious, comprehensive and binding UN climate agreement by the end of this year," Merkel and Hollande said.
The talks took place under the "Petersberg Climate Dialogue" initiative, launched by Merkel in 2010, to prepare for the UN Climate Change Conference in Paris in December.
Several dozen ecologist protesters shouted "stop coal, protect the climate" as Merkel and Hollande arrived at the meeting in central Berlin, attended by representatives of 35 countries which began yesterday.
Environmental group Greenpeace set up a six-metre high model of the Eiffel Tower converted into a wind turbine near the Brandenburg Gate to call for the use of only renewable energy sources by 2050.
"We can all more easily face the challenge posed by climate change if we can have confidence that our international partners pursue the same goal," Merkel said, addressing delegates.
Germany will strive to double its contribution towards international climate financing by 2020 from its 2014 level, she announced.
Merkel said industrial countries had a "duty" to now help others through innovation by demonstrating the more efficient technologies.
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